WO2016027789A1 - Wavelength conversion member, and light-emitting apparatus, light-emitting element, light source apparatus, and display apparatus using same - Google Patents

Wavelength conversion member, and light-emitting apparatus, light-emitting element, light source apparatus, and display apparatus using same Download PDF

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Publication number
WO2016027789A1
WO2016027789A1 PCT/JP2015/073061 JP2015073061W WO2016027789A1 WO 2016027789 A1 WO2016027789 A1 WO 2016027789A1 JP 2015073061 W JP2015073061 W JP 2015073061W WO 2016027789 A1 WO2016027789 A1 WO 2016027789A1
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WIPO (PCT)
Prior art keywords
light
wavelength conversion
conversion member
container
storage space
Prior art date
Application number
PCT/JP2015/073061
Other languages
French (fr)
Japanese (ja)
Inventor
晋吾 國土
宮永　昭治
榮一 金海
哲二 伊藤
投野　義和
Original Assignee
Ｎｓマテリアルズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ｎｓマテリアルズ株式会社 filed Critical Ｎｓマテリアルズ株式会社
Priority to CN201580044961.5A priority Critical patent/CN106663727B/en
Priority to KR1020177003704A priority patent/KR20170045206A/en
Priority to US15/504,200 priority patent/US10598844B2/en
Priority to EP15833902.8A priority patent/EP3185316A4/en
Priority to JP2016544205A priority patent/JP6746498B2/en
Publication of WO2016027789A1 publication Critical patent/WO2016027789A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0026—Wavelength selective element, sheet or layer, e.g. filter or grating
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured light
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/02—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
    • H01L33/04—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a quantum effect structure or superlattice, e.g. tunnel junction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/483—Containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements
    • H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements
    • H01L33/505—Wavelength conversion elements characterised by the shape, e.g. plate or foil
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/10—Details of semiconductor or other solid state devices to be connected
    • H01L2924/11—Device type
    • H01L2924/12—Passive devices, e.g. 2 terminal devices
    • H01L2924/1204—Optical Diode
    • H01L2924/12041—LED
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
    • H01L2933/0008—Processes
    • H01L2933/0033—Processes relating to semiconductor body packages
    • H01L2933/0041—Processes relating to semiconductor body packages relating to wavelength conversion elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements
    • H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
    • H01L33/502—Wavelength conversion materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements
    • H01L33/507—Wavelength conversion elements the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body

Definitions

  • the present invention relates to a wavelength conversion member in which a wavelength conversion member is filled in a container, and a light emitting device, a light emitting element, a light source device, and a display device using the wavelength conversion member.
  • Patent Document 1 discloses an invention related to a light emitting device including a light source, a wavelength conversion member, a light guide plate, and the like.
  • the wavelength conversion member is provided between the light source and the light guide plate, and absorbs light having a wavelength emitted from the light source, and then generates light having a different wavelength.
  • the wavelength conversion part substance is enclosed with cylindrical containers, such as glass, for example.
  • the wavelength changing substance includes a fluorescent pigment, a fluorescent dye, a quantum dot, or the like.
  • the wavelength changing substance absorbs blue light from a light source and converts a part thereof into red light or green light.
  • Patent Document 1 [0015] to [0017] describe that light from a light source passes through a wavelength conversion substance, and thereby red, green, and blue light are combined to generate white light. ing.
  • the present invention has been made in view of such points, and in particular, a wavelength conversion member capable of performing color conversion appropriately and with high efficiency, and a light emitting device, a light emitting element, and a light source device using the same
  • An object is to provide a display device.
  • the wavelength conversion member of the present invention includes a first surface, a second surface facing the first surface, and a side surface connecting the first surface and the second surface, and the side surface.
  • a container provided with a storage space on the inner side, a wavelength converting substance disposed in the storage space, and the second side from the side surface, the end of the second surface, or the side surface. And a colored layer formed over the end of the surface.
  • the wavelength conversion member of the present invention includes a first surface, a second surface facing the first surface, and a side surface connecting the first surface and the second surface, and the side surface.
  • the container further includes a container having a storage space inside, a wavelength converting substance disposed in the storage space, and a colored layer formed on a wall surface of the storage space.
  • the wavelength conversion member of the present invention includes a first surface, a second surface facing the first surface, and a side surface connecting the first surface and the second surface, and the side surface.
  • a container provided with a storage space on the inner side, a wavelength converting substance disposed in the storage space, and a colored layer provided between the side surface of the container and the storage space.
  • the wavelength converting material includes quantum dots.
  • the said wavelength conversion substance is formed with the resin composition which disperse
  • the wavelength conversion substance is formed of a resin composition in which the quantum dots are dispersed in a silicone resin.
  • vertical to at least any one of the said 1st surface and the said 2nd surface is a rectangular shape.
  • the colored layer is preferably colored white.
  • the colored layer is preferably composed of paint, ink, or tape.
  • the refractive index of resin which comprises the said wavelength conversion substance is smaller than the refractive index of the said container.
  • the light-emitting device in this invention has the light emitting element provided facing the said 1st surface, and the wavelength conversion member in any one of said arrange
  • the light-emitting element according to the present invention includes a light-emitting chip that emits blue light, and the wavelength conversion member according to any one of the above that is disposed on a light-emitting side of the light-emitting chip. To do.
  • the light source device includes the light emitting device described above or the light emitting element described above and a light guide plate.
  • the display device includes a display portion and the light-emitting device described above or the light-emitting element described above disposed on the back side of the display portion.
  • the wavelength conversion member of the present invention color conversion can be performed appropriately and efficiently compared to the conventional case.
  • the light emitting device, light emitting element, light source device, and display device of the present invention each include the wavelength conversion member of the present invention. Therefore, it can be appropriately and efficiently converted to a desired color through the wavelength conversion member or a color closer to the desired color, and the reliability of the apparatus can be increased. Thereby, power consumption can be reduced.
  • FIG. 2 is a cross-sectional view of the wavelength conversion member shown in FIG. 1 cut in a plane direction along the line AA and viewed from the direction of the arrows. It is sectional drawing of the wavelength conversion member which shows a different cross-sectional shape from FIG. It is sectional drawing of the wavelength conversion member which shows the cross-sectional shape different from FIG. 2, FIG. It is sectional drawing of the wavelength conversion member which shows a different cross-sectional shape from FIG. It is sectional drawing of the wavelength conversion member which shows a different cross-sectional shape from FIG. It is sectional drawing of the wavelength conversion member which shows a different cross-sectional shape from FIG. It is a top view of the light-emitting device and light source device using the wavelength conversion member shown in FIG.
  • FIG. 9 is an enlarged longitudinal sectional view taken in the height direction along the line BB and viewed from the arrow direction in a state where the wavelength conversion members shown in FIG. 8 are combined.
  • FIG. 9 is a longitudinal cross-sectional view of the light emitting device as viewed from the direction of the arrow, cut in the height direction along the line BB shown in FIG. 8 in a state where the members of the light emitting device shown in FIG.
  • FIG. 10 is an enlarged longitudinal sectional view of a wavelength conversion member showing a sectional shape different from FIG. 9. It is a longitudinal cross-sectional view of the display apparatus using the light emitting element shown in FIG.
  • Example 2 is an emission spectrum in Example 1.
  • 2 is a chromaticity diagram in Example 1.
  • FIG. 2 is an emission spectrum in Example 2.
  • 6 is a chromaticity diagram in Example 2.
  • FIG. 7 is an emission spectrum in Example 3.
  • 6 is a chromaticity diagram in Example 3.
  • FIG. 1 is a perspective view of a wavelength conversion member showing a first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of the wavelength conversion member shown in FIG. 1 cut along a line AA in the plane direction and viewed from the direction of the arrow.
  • the wavelength conversion member 1 in the first embodiment includes a container 2, a wavelength conversion material 3, and a colored layer 4.
  • the container 2 can store and hold the wavelength converting substance 3.
  • the container 2 is preferably a transparent member. “Transparent” refers to what is generally recognized as being transparent, or having a visible light transmittance of about 50% or more.
  • the container 2 includes a light incident surface 2a, a light emitting surface 2b, and a side surface 2c that connects the light incident surface 2a and the light emitting surface 2b. As shown in FIGS. 1 and 2, the light incident surface 2a and the light emitting surface 2b are in a positional relationship facing each other.
  • the container 2 has a storage space 5 formed inside the light incident surface 2a, the light emitting surface 2b, and the side surface 2c.
  • the storage space 5 should just be located inside at least the side surface 2c. That is, for example, a part of the storage space 5 may reach the light incident surface 2a and the light emitting surface 2b.
  • the wavelength conversion substance 3 is disposed in the storage space 5. As shown in FIG. 1, the storage space 5 is open, from which the wavelength converting substance 3 can be sealed and filled in the storage space 5.
  • the vertical and horizontal dimensions of the container 2 are about several mm to several tens of mm, and the vertical and horizontal dimensions of the storage space 5 are about several hundred ⁇ m to several mm.
  • the outer cross section of the storage space 5 and the outer cross section of the container 2 are both rectangular. It is formed with.
  • Such a cut surface is a surface cut in the direction in which the light incident surface 2a, the light emitting surface 2b, and the side surface 2c appear.
  • the “rectangular shape” has four vertices having a substantially right angle and includes a square and a rectangle.
  • the outer cross section of the storage space 5 and the outer cross section of the container 2 are preferably similar.
  • the container 2 shown in FIGS. 1 and 2 is, for example, a glass tube container, and can be exemplified by a glass capillary.
  • a resin or the like may be used as long as the container having excellent transparency can be configured as described above.
  • the wavelength conversion material 3 includes quantum dots. Fluorescent pigments other than quantum dots, fluorescent dyes, and the like may be used as the wavelength conversion substance 3, but the inclusion of quantum dots is excellent in wavelength conversion characteristics.
  • the wavelength converting substance 3 is preferably formed of a resin composition in which quantum dots are dispersed.
  • resins include polypropylene, polyethylene, polystyrene, AS resin, ABS resin, methacrylic resin, polyvinyl chloride, polyacetal, polyamide, polycarbonate, modified polyphenylene ether, polybutylene terephthalate, polyethylene terephthalate, polysulfone, polyethersulfone, and polyphenylene sulfide.
  • Polyamideimide, polymethylpentene, liquid crystal polymer, epoxy resin, phenol resin, urea resin, melamine resin, epoxy resin, diallyl phthalate resin, unsaturated polyester resin, polyimide, polyurethane, silicone resin, or some mixture thereof Etc. can be used.
  • the refractive index of the resin constituting the wavelength converting substance 3 is preferably smaller than the refractive index of the container 2.
  • the refractive index of the silicone resin is 1.52 for SCR1016 manufactured by Shin-Etsu Chemical Co., Ltd., 1.55 for A2045 manufactured by Daicel Corporation, at 23 ° C., sodium D line, manufactured by Shin-Etsu Chemical Co., Ltd. KER-2500 of 1.41 and A1080 manufactured by Daicel Corporation of 1.41.
  • the refractive index of an epoxy resin is 1.51 in Cell Venus WO917 made from Daicel Corporation, and 1.50 in Cell Venus WO925 in sodium D line
  • the refractive index of the container 2 made of glass is about 1.45 in the case of general glass, and about 1.50 to 1.90 in the case of optical glass with a high refractive index. Therefore, by appropriately selecting the resin constituting the wavelength converting substance 3 and the material of the container 2, the refractive index of the resin constituting the wavelength converting substance 3 can be made smaller than the refractive index of the container 2.
  • A1080 or KER-2500 which is a silicone resin having a refractive index of 1.41, is used as the resin constituting the wavelength converting substance 3, and the container 2 can be made of glass having a refractive index of 1.45.
  • a silicone resin or an epoxy resin having a refractive index of 1.41 to 1.55 is used as a resin constituting the wavelength converting substance 3, and the container 2 is made of a high refractive index glass having a refractive index of 1.56 or more. Can be configured.
  • a part of the light that has entered the wavelength converting substance 3 is totally reflected by the side wall portion of the container 2 facing the storage space 5. This is because the incident angle on the medium side with a small refractive index is larger than the incident angle on the medium side with a large refractive index.
  • the resin constituting the wavelength converting substance 3 here is not limited to the resin for dispersing the quantum dots.
  • the quantum dot in this Embodiment has the core of a semiconductor particle, and the shell part which coat
  • CdSe is used for the core, but the material is not particularly limited.
  • a core material containing at least Zn and Cd, a core material containing Zn, Cd, Se and S, ZnCuInS, CdS, CdSe, ZnS, ZnSe, InP, CdTe, and some composites thereof are used. it can.
  • the quantum dot in this Embodiment may be comprised only by the core part of a semiconductor particle, without forming a shell part. That is, the quantum dot does not need to have a covering structure with a shell part as long as it has at least a core part. For example, when the shell portion is coated on the core portion, the region that becomes the covering structure may be small or the covering portion may be too thin to analyze and confirm the covering structure. Therefore, it can be determined as a quantum dot regardless of the presence or absence of the shell portion by analysis.
  • Quantum dots include, for example, two types of quantum dots having an absorption wavelength of 460 nm (blue) and a fluorescence wavelength of about 520 nm (green) and a quantum dot of about 660 nm (red). For this reason, when blue light is incident from the light incident surface 2a, a part of blue is converted into green or red by each quantum dot. Thereby, white light can be obtained from the light emitting surface 2b. However, conventionally, blue light cannot be appropriately converted into white light. This is because the blue light passes through the side region 7 (see FIG. 2) between the storage space 5 filled with the wavelength converting substance 3 and the side surface 2c (see FIG. 2) from the light incident surface 2a to the light emitting surface 2b. This is because the blue wavelength intensity is strong at 2b.
  • the colored layers 4 and 4 are provided on the side surfaces 2c and 2c as shown in FIGS.
  • the “colored layer” is a layer that is not transparent, and refers to a layer colored in colors including white.
  • the colored layer 4 is preferably composed of paint, ink, or tape.
  • the color of the colored layer 4 is not limited, it is suitable that it is white. Therefore, the colored layer 4 can be easily formed by simply applying white paint or white ink to the side surface 2c or simply applying a white tape to the side surface 2c.
  • the metal layer 4 can be formed by vapor-depositing a metal such as Ni, Ag, Al, or Cr.
  • the emission intensity of white light can be made equal to or higher than that of the prior art.
  • the colored layer 4 is formed on the side surface 2c of the container 2, but as shown in FIG. 3A, the colored layer 4 extends from the side surface 2c of the container 2 to the end 2e of the light emitting surface 2b. Can be formed. Or as shown to FIG. 3B, the colored layer 4 can also be formed only in the edge part 2e of the light-projection surface 2b.
  • the colored layer 4 is preferably formed from the side surface 2c of the container 2 as shown in FIG. 2 or from the side surface 2c of the container 2 to the end 2e of the light emitting surface 2b as shown in FIG. 3A.
  • the end 2e of the light exit surface 2b faces the side region 7 between the storage space 5 and the side surface 2c. Therefore, the end 2e does not face the storage space 5 filled with the wavelength converting substance 3. Therefore, the colored layer 4 provided at the end 2e of the light exit surface 2b is preferably located on both sides of the storage space 5 filled with the wavelength converting substance 3 and does not face the storage space 5, but the light exit surface 2b.
  • the colored layer 4 may be formed to be slightly longer and may partially face the storage space 5.
  • the colored layer 4 is included in the allowable range as long as it faces about 1/3 or less of the width of the storage space 5.
  • the colored layer 4 is preferably formed on the entire surface of the side surface 2c or the end portion 2e, but may not necessarily be the entire surface, and may be a part of the side surface 2c or the end portion 2e. However, the colored layer 4 preferably covers an area of 50% or more of the side surface 2c or the end 2e. Further, the colored layer 4 may be formed by using all or part of the side region 7 as a colored material instead of being formed on the side region 7. For example, all or part of the side region 7 can be formed by using white glass or white resin.
  • the cross-sectional shape is preferably such that the outer shape of the container 2 and the storage space 5 is rectangular.
  • the side surface 2c of the container 2 and the side wall surface of the storage space 5 may be curved or may have an elliptical configuration.
  • the outer shape of the container 2 and the storage space 5 is square, but as shown in FIG. 4B, the outer shape of the container 2 and the storage space 5 can be rectangular.
  • the outer shapes of the cross section of the container 2 and the storage space 5 are similar to each other, but as shown in FIG. 4C, the outer shape of the cross section of the container 2 and the storage space It is also possible to make the outer shape of the cross section of 5 different.
  • the outer shape of the cross section of the container 2 is a rectangular shape
  • the outer shape of the cross section of the storage space 5 is a hexagon.
  • making the outer shape of the cross section of the container 2 and the storage space 5 similar to each other has the effect of providing the colored layer 4 of the present embodiment (color conversion can be performed appropriately and efficiently, and desired as compared with the prior art.
  • the external shape of the cross section of the container 2 and the storage space 5 can be made into a trapezoid shape similar to each other.
  • the shorter side of the trapezoid is the light incident surface 2a
  • the longer side is the light emitting surface 2b.
  • the light emitted from the light source can be enlarged to a predetermined size.
  • the long side of the trapezoid may be the light incident surface 2a and the short side may be the light emitting surface 2b. Thereby, the light emitted from the light source can be condensed to a predetermined size.
  • the outer shapes of the cross sections of the container 2 and the storage space 5 are different from those in FIG. 4D, and the side surfaces are formed symmetrically with respect to the center line passing through the centers of the upper base and the lower base of the trapezoid. May be.
  • the light incident surface and the light exit surface are formed as flat surfaces, but either one of the light incident surface and the light exit surface or both are formed as curved surfaces. May be.
  • the side surface of the container 2 is formed as a flat surface, but the side surface may be formed as a curved surface.
  • the corners between the sides may be R-shaped.
  • expressions such as a rectangular shape, a hexagonal shape, and a trapezoidal shape are not limited to geometrically accurate quadrangular shapes, hexagonal shapes, trapezoidal shapes, etc., and lines and angles constituting these have distortions, or Including errors are also included. By these, the direction of the emitted light can be adjusted.
  • the colored layer 4 is formed on the side surface 2c of the container 2, but the colored layer 4 is formed on the side surface 2c of the container 2 from the side 2c of the container 2 as shown in FIG. 3A. It can also be provided on the end 2e of the light exit surface 2b as shown in FIG. 3B.
  • the colored layer 4 is formed on the outer surface of the container 2, but the colored layer 4 can also be formed on the wall surface 5a of the internal space 5, as shown in FIG.
  • the wall surface 5 a that forms the colored layer 4 is located at a position facing the side surface 2 c of the container 2.
  • the side portion 2 d of the container 2 between the side surface 2 c of the container 2 and the internal space 5 can be a colored layer 4.
  • the container 2 is molded in two colors, and at this time, a colored resin is used for a portion to be the side portion 2d of the container 2.
  • the container 2 shown in FIG. 6 can be formed by bonding the side part 2d of the container 2 and other parts by bonding or the like. 5 and 6, the same reference numerals as those in FIGS. 2 and 3 indicate the same parts as those in FIGS.
  • the wavelength conversion member 1 shown in FIG. 1 can be interposed between a light emitting element 10 such as an LED and a light guide plate 12 as shown in FIG.
  • a combination of the wavelength conversion member 1 and the light emitting element 10 is a light emitting device, and a light source plate 12 is added to the light emitting device to constitute a light source device.
  • the light guide member can be configured by combining the wavelength conversion member 1 and the light guide plate 12.
  • the light emitting device shown in FIG. 7 can be used as a white surface light source of a liquid crystal display, for example.
  • the light emitted from the light emitting element 10 is incident from the light incident surface 2 a of the wavelength conversion member 1, wavelength-converted by the wavelength conversion material 3 (see FIG. 1), and wavelength-converted light. Is emitted from the light exit surface 2b to the light guide plate 12.
  • the colored layer 4 formed on the side surface 2c of the container 2 constituting the wavelength conversion member 1 appears on the upper and lower surfaces.
  • Light of a desired color can be obtained from the light emitting surface 2b.
  • the desired color of emitted light is white light
  • the light-emitting device and the light source device shown in FIG. 7 can emit white light more effectively than conventional ones, and can improve the reliability of the device.
  • FIG. 8 is an exploded perspective view of a light-emitting element provided with a wavelength conversion member according to the second embodiment of the present invention.
  • FIG. 9 is an enlarged longitudinal sectional view taken along the line BB in the height direction and viewed from the arrow direction in a state where the wavelength conversion members shown in FIG. 8 are combined.
  • FIG. 10 is a longitudinal cross-sectional view of the light-emitting element as viewed from the direction of the arrow, cut in the height direction along the line BB shown in FIG. 8 in a state where the members of the light-emitting element shown in FIG. 8 are combined.
  • the wavelength conversion member 21 includes a container 25 formed of a plurality of pieces of a container main body 23 and a lid body 24. As shown in FIGS. 8, 9, and 10, a bottomed storage space 26 is formed at the center of the container body 23. The wavelength conversion substance 27 is filled in the storage space 26.
  • the lid body 24 is joined to the container body 23 via an adhesive layer (not shown). Further, the colored layer 28 is formed on the side surface 25 c of the container 25.
  • the lower surface of the container 25 of the wavelength conversion member 21 is a light incident surface 25 a.
  • the upper surface facing the light incident surface 25a is the light emitting surface 25b.
  • a storage space 26 is formed at a position inside the side surface 25c provided in the container 25 of the wavelength conversion member 21 shown in FIGS. 9 shows the side surface 25c that appears on the cut surface along the line BB in FIG. 8, but the other two side surfaces 25c that do not appear on the cut surface along the line BB (the front side and the back surface shown in FIG. 8).
  • the colored layer 28 it is preferable to form the colored layer 28 on the side). If it is effective to provide the colored layer 28 on a certain side surface 25c due to the directivity of light, the colored layer 28 may be provided only on the certain side surface 25c and the colored layer 28 may not be provided on the other side surface 25c. Good. However, it is preferable to provide the colored layer 28 on all the side surfaces 25c.
  • the LED chip 22 is connected to a printed wiring board 29, and the periphery of the LED chip 22 is surrounded by a frame 30 as shown in FIGS.
  • the inside of the frame 30 is sealed with a resin layer 31.
  • the wavelength conversion member 21 is joined to the upper surface of the frame body 30 via an adhesive layer (not shown) to form a light emitting element 20 such as an LED.
  • the colored layer 28 may be formed from the side surface 25c of the container 25 of the wavelength conversion member 21 to the end portion 25e of the light emitting surface 25b. Further, as shown in FIG. 11B, the colored layer 28 may be formed only on the end portion 25e of the light emitting surface 25b.
  • FIG. 12 is a longitudinal sectional view of a display device using the light emitting element shown in FIG.
  • the display device 50 includes a plurality of light emitting elements 20 (LEDs) and a display unit 54 such as a liquid crystal display facing the light emitting elements 20.
  • Each light emitting element 20 is disposed on the back side of the display unit 54.
  • the plurality of light emitting elements 20 are supported by the support body 52.
  • the light emitting elements 20 are arranged at a predetermined interval.
  • Each light emitting element 20 and the support 52 constitute a backlight 55 for the display unit 54.
  • the support 52 is not particularly limited in shape or material such as a sheet shape, a plate shape, or a case shape.
  • a light diffusion plate 53 or the like is interposed between the backlight 55 and the display unit 54.
  • the light-emitting device (including the light-emitting element, the capillary-shaped wavelength conversion member 1, the light guide plate 12, and the like) shown in FIG. 7 is disposed on the back side of the display unit 54 shown in FIG.
  • the display device 50 may be configured.
  • the wavelength conversion member and the light emitting element of the present embodiment can be applied to other types of light source devices, illumination devices, light diffusion devices, light reflection devices, and the like. it can.
  • Example 1 A silicone resin was used as a dispersion resin for the quantum dots, and the silicone resin in which the quantum dots were dispersed was sealed in a capillary. The quantum dot concentration was set to a concentration at which the absorbance was 15%.
  • Example 2 An epoxy resin was used as a dispersion resin for the quantum dots, and the epoxy resin in which the quantum dots were dispersed was sealed in a capillary. The quantum dot concentration was set to a concentration at which the absorbance was 15%.
  • Example 1 In Example 1, the sample 1 was used, a wavelength conversion member (hereinafter referred to as “none_1”) in which no paint was applied to the capillary, and a wavelength conversion member (hereinafter, referred to as “none_1”) in which white paint was applied to the end of the light emission surface of the capillary. "Top_1”), a wavelength conversion member (hereinafter referred to as "side_1”) coated with white paint on the side of the light exit surface of the capillary, white paint from the side of the light exit surface of the capillary to the end of the light exit surface The wavelength conversion member (henceforth "side + top_1”) which apply
  • the white paint suppresses blue light leakage from the side region from the light incident surface to the light emitting surface, so that the synthetic hole on the light emitting surface is conventional (none_1).
  • side_1 and side + top_1 were able to obtain white light or near-white light.
  • all of top_1, side_1, and side + top_1 were able to obtain white light emission intensity equal to or higher than that of none_1.
  • the increase in the light emission intensity of white light was more noticeable than that of none_1.
  • Example 2 In Example 2, a wavelength conversion member (hereinafter referred to as “none_2”) in which the sample 1 is used and no paint is applied to the capillary, and a wavelength conversion member (top_2) in which silver paint is applied to the end of the light emission surface of the capillary A wavelength converting member (side_2) coated with silver paint on the side of the light emitting surface of the capillary, and a wavelength converting member (side + top_2) coated with silver paint from the side of the light emitting surface of the capillary to the end of the light emitting surface. Prepared.
  • Example 1 by applying silver paint, blue is weaker than none_2 and close to white.
  • the effect of Example 1 with white paint was greater than that of Example 2.
  • Example 3 In Example 3, the sample 2 was used, a wavelength conversion member (none_3) in which no paint was applied to the capillary, a wavelength conversion member (top_3) in which white paint was applied to the end of the light output surface of the capillary, and light output from the capillary A wavelength converting member (side_3) coated with white paint on the side surface of the surface and a wavelength converting member (side + top_3) coated with white paint from the side surface of the light emitting surface of the capillary to the end of the light emitting surface were prepared.
  • blue is weaker than none_3 and close to white, but it is better to use a silicone resin as the dispersion resin (see FIG. 14). It has been found that blue can be suppressed and white can be made closer than when an epoxy resin is used.
  • Example 3 An epoxy resin was used as a dispersion resin for the quantum dots, and the epoxy resin in which the quantum dots were dispersed was sealed in a capillary. The density
  • Sample 4 An epoxy resin was used as a dispersion resin for the quantum dots, and the epoxy resin in which the quantum dots were dispersed was sealed in a capillary. The density
  • Example 5 A silicone resin was used as a dispersion resin for the quantum dots, and the silicone resin in which the quantum dots were dispersed was sealed in a capillary.
  • concentration of the quantum dot in dispersion resin was made into the density
  • Comparative Example 1 In Comparative Example 1, a sample 3 was used and a wavelength conversion member in which paint was not applied to the capillary was prepared. The measurement results obtained by measuring the luminous flux are shown in Table 1 below.
  • Comparative Example 2 In Comparative Example 2, a sample 4 was used and a wavelength conversion member in which no paint was applied to the capillary was prepared. The measurement results obtained by measuring the luminous flux are shown in Table 2 below.
  • Example 3 to 5 wavelength conversion members were prepared by using Sample 1 and applying white paint to the side surfaces of the capillaries. The measurement position at which the light flux measurement was performed was changed in Examples 3-5.
  • Example 4 was set as the measurement position in the vicinity of the center of the light guide plate, and Examples 3 and 5 were positioned on both sides thereof.
  • Example 3 The measurement results of Example 3 are shown in Table 3 below, the measurement results of Example 4 are shown in Table 4, and the measurement results of Example 5 are shown in Table 5 below.
  • Example 6 In Examples 6 to 8, wavelength conversion members were prepared using Sample 5 and applying white paint to the side surfaces of the capillaries. The measurement position at which the light flux measurement was performed was changed in Examples 6-8. In Example 7, the vicinity of the center of the light guide plate was used, and in Examples 6 and 8, both side positions thereof were set as measurement positions.
  • Example 6 The measurement results of Example 6 are shown in Table 6 below, the measurement results of Example 7 are shown in Table 7, and the measurement results of Example 8 are shown in Table 8 below.
  • the x coordinate of the chromaticity diagram can be 0.30 to 0.40
  • the y coordinate can be 0.35 to 045
  • the color temperature can be about 4000 K to 6500 K in the example.
  • an LED, a backlight device, a display device, or the like can be realized using a wavelength conversion member in which a wavelength conversion substance is sealed in a container.
  • a wavelength conversion member of the present invention since color conversion can be performed appropriately and with high efficiency, it is possible to reduce power consumption of an LED, a backlight device, a display device, and the like using the wavelength conversion member of the present invention. it can.

Abstract

The purpose of the present invention is to provide, in particular, a wavelength conversion member capable of performing more appropriate color conversion than conventionally, as well as a light-emitting apparatus, a light-emitting element, a light source apparatus, and a display apparatus using the same. A wavelength conversion member (1) of the present invention is provided with a light-entrance surface (2a), a light-exit surface (2b), and lateral surfaces (2c) that connect between the light-entrance surface and the light-exit surface and is characterized by having a container (2) provided with a storage space (5) disposed father inward than the lateral surfaces, a wavelength conversion substance (3) filling the storage space, and colored layers (4) formed on the lateral surfaces.

Description

波長変換部材、及びそれを用いた発光装置、発光素子、光源装置、並びに表示装置Wavelength conversion member, and light emitting device, light emitting element, light source device, and display device using the same
　本発明は、容器内に波長変換部材を充填した波長変換部材、及びそれを用いた発光装置、発光素子、光源装置、並びに表示装置に関する。 The present invention relates to a wavelength conversion member in which a wavelength conversion member is filled in a container, and a light emitting device, a light emitting element, a light source device, and a display device using the wavelength conversion member.
　例えば下記の特許文献１には、光源、波長変換部材及び導光板等を備えた発光装置に関する発明が開示されている。 For example, the following Patent Document 1 discloses an invention related to a light emitting device including a light source, a wavelength conversion member, a light guide plate, and the like.
　波長変換部材は、光源と導光板との間に設けられ、光源が発する波長の光を吸収した後、これとは異なる波長の光を発生させるものである。波長変換部材は、例えばガラス等の筒状の容器に波長変換部物質が封入されている。波長変化物質には、蛍光顔料、蛍光染料又は量子ドット等が含まれる。例えば波長変化物質は、光源の青色光を吸収して、その一部を赤色光又は緑色光に変換する。そして、特許文献１の[００１５]～［００１７］には、光源の光が波長変換物質を通過することにより、赤色、緑色、及び青色の光が合成されて白色光が生成されると記載されている。 The wavelength conversion member is provided between the light source and the light guide plate, and absorbs light having a wavelength emitted from the light source, and then generates light having a different wavelength. As for the wavelength conversion member, the wavelength conversion part substance is enclosed with cylindrical containers, such as glass, for example. The wavelength changing substance includes a fluorescent pigment, a fluorescent dye, a quantum dot, or the like. For example, the wavelength changing substance absorbs blue light from a light source and converts a part thereof into red light or green light. In Patent Document 1, [0015] to [0017] describe that light from a light source passes through a wavelength conversion substance, and thereby red, green, and blue light are combined to generate white light. ing.
特開２０１３―２１８９５４号公報JP 2013-218854 A
　しかしながら、特許文献１に示す構成では、光源から波長変換部材を通過した光の色合いは、光源色に近く、適切に色変換されていないことがわかった。光源からの光は、波長変換物質の側方に位置する容器側部内も通り抜ける。このため、波長変換部材の光出射面では、波長変換物質内を通った光と、波長変換物質内を通らずに容器側部内を通過した光とが混じり合い、合成色としては、光源色に近い色合いとなってしまう。 However, in the configuration shown in Patent Document 1, it has been found that the hue of light that has passed through the wavelength conversion member from the light source is close to the light source color and is not appropriately color-converted. Light from the light source passes through the side of the container located on the side of the wavelength converting substance. For this reason, on the light exit surface of the wavelength conversion member, the light that has passed through the wavelength conversion substance and the light that has passed through the side of the container without passing through the wavelength conversion substance are mixed together, and the combined color is the light source color. It becomes a close hue.
　したがって上記のように、光源の青色光を、白色光に変換するために波長変換部材に通しても、白色光に適切に変換できなかった。 Therefore, as described above, even when the blue light of the light source is passed through the wavelength conversion member in order to convert it into white light, it cannot be converted into white light appropriately.
　本発明はかかる点に鑑みてなされたものであり、特に、従来に比べて、色変換を適切かつ高効率に行うことができる波長変換部材、及びそれを用いた発光装置、発光素子、光源装置、並びに表示装置を提供することを目的とする。 The present invention has been made in view of such points, and in particular, a wavelength conversion member capable of performing color conversion appropriately and with high efficiency, and a light emitting device, a light emitting element, and a light source device using the same An object is to provide a display device.
　本発明の波長変換部材は、第１の面、前記第１の面に対向する第２の面、及び、前記第１の面と前記第２の面との間を繋ぐ側面を備え、前記側面よりも内側に収納空間が設けられた容器と、前記収納空間内に配置された波長変換物質と、前記側面上、前記第２の面の端部上、又は、前記側面上から前記第２の面の端部上にかけて形成された着色層と、を有することを特徴とする。 The wavelength conversion member of the present invention includes a first surface, a second surface facing the first surface, and a side surface connecting the first surface and the second surface, and the side surface. A container provided with a storage space on the inner side, a wavelength converting substance disposed in the storage space, and the second side from the side surface, the end of the second surface, or the side surface. And a colored layer formed over the end of the surface.
　本発明の波長変換部材は、第１の面、前記第１の面に対向する第２の面、及び、前記第１の面と前記第２の面との間を繋ぐ側面を備え、前記側面よりも内側に収納空間が設けられた容器と、前記収納空間内に配置された波長変換物質と、前記収納空間の壁面に形成された着色層と、を有することを特徴とする。 The wavelength conversion member of the present invention includes a first surface, a second surface facing the first surface, and a side surface connecting the first surface and the second surface, and the side surface. The container further includes a container having a storage space inside, a wavelength converting substance disposed in the storage space, and a colored layer formed on a wall surface of the storage space.
　本発明の波長変換部材は、第１の面、前記第１の面に対向する第２の面、及び、前記第１の面と前記第２の面との間を繋ぐ側面を備え、前記側面よりも内側に収納空間が設けられた容器と、前記収納空間内に配置された波長変換物質と、前記容器の前記側面と前記収納空間までの間に設けられた着色層と、を有することを特徴とする。 The wavelength conversion member of the present invention includes a first surface, a second surface facing the first surface, and a side surface connecting the first surface and the second surface, and the side surface. A container provided with a storage space on the inner side, a wavelength converting substance disposed in the storage space, and a colored layer provided between the side surface of the container and the storage space. Features.
　また本発明では、前記波長変換物質は、量子ドットを含むことが好ましい。また本発明では、前記波長変換物質は、前記量子ドットを分散した樹脂組成物により形成されることが好ましい。このとき、前記波長変換物質は、前記量子ドットをシリコーン樹脂に分散した樹脂組成物により形成されることが好ましい。 In the present invention, it is preferable that the wavelength converting material includes quantum dots. Moreover, in this invention, it is preferable that the said wavelength conversion substance is formed with the resin composition which disperse | distributed the said quantum dot. At this time, it is preferable that the wavelength conversion substance is formed of a resin composition in which the quantum dots are dispersed in a silicone resin.
　また本発明では、前記第１の面及び前記第２の面の、少なくともいずれか一方に垂直な平面で切断した、前記収納空間及び前記容器の外形断面は、いずれも矩形状であることが好ましい。 Moreover, in this invention, it is preferable that the external space cross section cut | disconnected by the plane perpendicular | vertical to at least any one of the said 1st surface and the said 2nd surface is a rectangular shape. .
　また本発明では、前記着色層は、白色に着色されていることが好ましい。また本発明では、前記着色層は塗料、インク、あるいはテープにより構成されることが好ましい。また本発明では、前記波長変換物質を構成する樹脂の屈折率は、前記容器の屈折率よりも小さいことが好ましい。 In the present invention, the colored layer is preferably colored white. In the present invention, the colored layer is preferably composed of paint, ink, or tape. Moreover, in this invention, it is preferable that the refractive index of resin which comprises the said wavelength conversion substance is smaller than the refractive index of the said container.
　また本発明における発光装置は、前記第１の面に対向して設けられた発光素子と、前記発光素子の発光側に配置される上記のいずれかに記載の波長変換部材と、を有して構成されることを特徴とする。 Moreover, the light-emitting device in this invention has the light emitting element provided facing the said 1st surface, and the wavelength conversion member in any one of said arrange | positioned at the light emission side of the said light emitting element. It is characterized by being configured.
　また本発明における発光素子は、青色光を発する発光チップと、前記発光チップの光出射側に配置された上記のいずれかに記載の波長変換部材と、を有して構成されることを特徴とする。 The light-emitting element according to the present invention includes a light-emitting chip that emits blue light, and the wavelength conversion member according to any one of the above that is disposed on a light-emitting side of the light-emitting chip. To do.
　また本発明における光源装置は、上記に記載の発光装置、あるいは、上記に記載の発光素子と、導光板と、を有することを特徴とする。 The light source device according to the present invention includes the light emitting device described above or the light emitting element described above and a light guide plate.
　また本発明における表示装置は、表示部と、前記表示部の裏面側に配置された上記に記載の発光装置、あるいは、上記に記載の発光素子と、を有することを特徴とする。 The display device according to the present invention includes a display portion and the light-emitting device described above or the light-emitting element described above disposed on the back side of the display portion.
　本発明の波長変換部材によれば、従来に比べて、色変換を適切かつ高効率に行うことができる。本発明の発光装置、発光素子、光源装置及び表示装置は、いずれも本発明の波長変換部材を備えている。したがって波長変換部材を通して所望の色に、あるいは所望の色により近い色に適切かつ高効率に変換でき、装置としての信頼度を高めることができる。これにより、消費電力を低減することができる。 According to the wavelength conversion member of the present invention, color conversion can be performed appropriately and efficiently compared to the conventional case. The light emitting device, light emitting element, light source device, and display device of the present invention each include the wavelength conversion member of the present invention. Therefore, it can be appropriately and efficiently converted to a desired color through the wavelength conversion member or a color closer to the desired color, and the reliability of the apparatus can be increased. Thereby, power consumption can be reduced.
本発明における第１の実施の形態を示す波長変換部材の斜視図である。It is a perspective view of the wavelength conversion member which shows a 1st embodiment in the present invention. 図１に示す波長変換部材をＡ－Ａ線に沿って平面方向に切断し矢印方向から見た断面図である。FIG. 2 is a cross-sectional view of the wavelength conversion member shown in FIG. 1 cut in a plane direction along the line AA and viewed from the direction of the arrows. 図２とは異なる断面形状を示す波長変換部材の断面図である。It is sectional drawing of the wavelength conversion member which shows a different cross-sectional shape from FIG. 図２、図３とは異なる断面形状を示す波長変換部材の断面図である。It is sectional drawing of the wavelength conversion member which shows the cross-sectional shape different from FIG. 2, FIG. 図２とは異なる断面形状を示す波長変換部材の断面図である。It is sectional drawing of the wavelength conversion member which shows a different cross-sectional shape from FIG. 図２とは異なる断面形状を示す波長変換部材の断面図である。It is sectional drawing of the wavelength conversion member which shows a different cross-sectional shape from FIG. 図１に示す波長変換部材を用いた発光装置及び光源装置の平面図である。It is a top view of the light-emitting device and light source device using the wavelength conversion member shown in FIG. 本発明における第２の実施の形態を示す波長変換部材を備えた発光素子の分解斜視図である。It is a disassembled perspective view of the light emitting element provided with the wavelength conversion member which shows 2nd Embodiment in this invention. 図８に示す波長変換部材を組み合せた状態で、Ｂ－Ｂ線に沿って高さ方向に切断し矢印方向から見た拡大縦断面図である。FIG. 9 is an enlarged longitudinal sectional view taken in the height direction along the line BB and viewed from the arrow direction in a state where the wavelength conversion members shown in FIG. 8 are combined. 図８に示す発光素子の各部材を組み合わせた状態で、図８に示すＢ－Ｂ線に沿って高さ方向に切断し矢印方向から見た発光素子の縦断面図である。FIG. 9 is a longitudinal cross-sectional view of the light emitting device as viewed from the direction of the arrow, cut in the height direction along the line BB shown in FIG. 8 in a state where the members of the light emitting device shown in FIG. 図９とは異なる断面形状を示す波長変換部材の拡大縦断面図である。FIG. 10 is an enlarged longitudinal sectional view of a wavelength conversion member showing a sectional shape different from FIG. 9. 図８に示す発光素子を用いた表示装置の縦断面図である。It is a longitudinal cross-sectional view of the display apparatus using the light emitting element shown in FIG. 実施例１における発光スペクトルである。2 is an emission spectrum in Example 1. 実施例１における色度図である。2 is a chromaticity diagram in Example 1. FIG. 実施例２における発光スペクトルである。2 is an emission spectrum in Example 2. 実施例２における色度図である。6 is a chromaticity diagram in Example 2. FIG. 実施例３における発光スペクトルである。7 is an emission spectrum in Example 3. 実施例３における色度図である。6 is a chromaticity diagram in Example 3. FIG.
　以下、本発明の一実施の形態（以下、「実施の形態」と略記する。）について、詳細に説明する。なお、本発明は、以下の実施の形態に限定されるものではなく、その要旨の範囲内で種々変形して実施することができる。 Hereinafter, an embodiment of the present invention (hereinafter abbreviated as “embodiment”) will be described in detail. In addition, this invention is not limited to the following embodiment, It can implement by changing variously within the range of the summary.
　図１は、本発明における第１の実施の形態を示す波長変換部材の斜視図である。図２は、図１に示す波長変換部材をＡ－Ａ線に沿って平面方向に切断し矢印方向から見た断面図である。 FIG. 1 is a perspective view of a wavelength conversion member showing a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the wavelength conversion member shown in FIG. 1 cut along a line AA in the plane direction and viewed from the direction of the arrow.
　図１、図２に示すように、第１の実施の形態における波長変換部材１は、容器２と、波長変換物質３と、着色層４とを有して構成される。 As shown in FIGS. 1 and 2, the wavelength conversion member 1 in the first embodiment includes a container 2, a wavelength conversion material 3, and a colored layer 4.
　容器２は、波長変換物質３を収納し保持することが可能とされる。容器２は透明な部材であることが好ましい。「透明」とは、一般的に透明と認識されるものや、可視光線透過率が約５０％以上のものを指す。 The container 2 can store and hold the wavelength converting substance 3. The container 2 is preferably a transparent member. “Transparent” refers to what is generally recognized as being transparent, or having a visible light transmittance of about 50% or more.
　図１、図２に示すように容器２は、光入射面２ａ、光出射面２ｂ、及び、光入射面２ａと光出射面２ｂとの間を繋ぐ側面２ｃとを備える。図１、図２に示すように、光入射面２ａと光出射面２ｂとは互いに対向した位置関係にある。 As shown in FIGS. 1 and 2, the container 2 includes a light incident surface 2a, a light emitting surface 2b, and a side surface 2c that connects the light incident surface 2a and the light emitting surface 2b. As shown in FIGS. 1 and 2, the light incident surface 2a and the light emitting surface 2b are in a positional relationship facing each other.
　図１、図２に示すように、容器２には、光入射面２ａ、光出射面２ｂ及び側面２ｃよりも内側に収納空間５が形成されている。収納空間５は少なくとも側面２ｃよりも内側に位置していればよい。すなわち、例えば収納空間５の一部は、光入射面２ａ及び光出射面２ｂにまで達していてもよい。 As shown in FIGS. 1 and 2, the container 2 has a storage space 5 formed inside the light incident surface 2a, the light emitting surface 2b, and the side surface 2c. The storage space 5 should just be located inside at least the side surface 2c. That is, for example, a part of the storage space 5 may reach the light incident surface 2a and the light emitting surface 2b.
　収納空間５には、波長変換物質３が配置されている。図１に示すように、収納空間５は開口しており、ここから波長変換物質３を収納空間５内に封入して、充填することができる。 The wavelength conversion substance 3 is disposed in the storage space 5. As shown in FIG. 1, the storage space 5 is open, from which the wavelength converting substance 3 can be sealed and filled in the storage space 5.
　例えば、容器２の縦横寸法の大きさは、数ｍｍ～数十ｍｍ程度、収納空間５の縦横寸法は、数百μｍ～数ｍｍ程度である。 For example, the vertical and horizontal dimensions of the container 2 are about several mm to several tens of mm, and the vertical and horizontal dimensions of the storage space 5 are about several hundred μm to several mm.
　図２に示すように、光入射面２ａ及び光出射面２ｂの、少なくともいずれか一方に垂直な平面で切断した断面形状において、収納空間５の外形断面及び容器２の外形断面はいずれも矩形状で形成されている。このような切断面は、光入射面２ａ、光出射面２ｂ及び側面２ｃが現れる方向に向けて切断した面である。ここで「矩形状」とは４つの頂点が略直角であり、正方形、長方形を含む。 As shown in FIG. 2, in the cross-sectional shape cut by a plane perpendicular to at least one of the light incident surface 2a and the light emitting surface 2b, the outer cross section of the storage space 5 and the outer cross section of the container 2 are both rectangular. It is formed with. Such a cut surface is a surface cut in the direction in which the light incident surface 2a, the light emitting surface 2b, and the side surface 2c appear. Here, the “rectangular shape” has four vertices having a substantially right angle and includes a square and a rectangle.
　図２に示すように、収納空間５の外形断面及び容器２の外形断面は相似形であることが好ましい。 As shown in FIG. 2, the outer cross section of the storage space 5 and the outer cross section of the container 2 are preferably similar.
　図１、図２に示す容器２は例えばガラス管の容器であり、ガラスキャピラリを例示できる。ただし、上記したように透明性に優れる容器を構成できれば樹脂等であってもよい。 The container 2 shown in FIGS. 1 and 2 is, for example, a glass tube container, and can be exemplified by a glass capillary. However, a resin or the like may be used as long as the container having excellent transparency can be configured as described above.
　図１、図２に示す波長変換物質３は、青色の光を吸収して赤色の光を発する物質、及び、青色の光を吸収して緑色の光を発する物質を含むことが好ましい。具体的には、波長変換物質３に量子ドットを含むことが好ましい。波長変換物質３として、量子ドット以外の蛍光顔料、蛍光染料等を用いてもよいが、量子ドットを含むことが、波長変換特性に優れる。 1 and 2 preferably include a substance that absorbs blue light and emits red light, and a substance that absorbs blue light and emits green light. Specifically, it is preferable that the wavelength conversion material 3 includes quantum dots. Fluorescent pigments other than quantum dots, fluorescent dyes, and the like may be used as the wavelength conversion substance 3, but the inclusion of quantum dots is excellent in wavelength conversion characteristics.
　波長変換物質３は、量子ドットを分散した樹脂組成物により形成されることが好ましい。樹脂としては、ポリプロピレン、ポリエチレン、ポリスチレン、ＡＳ樹脂、ＡＢＳ樹脂、メタクリル樹脂、ポリ塩化ビニル、ポリアセタール、ポリアミド、ポリカーボネート、変性ポリフェニレンエーテル、ポリブチレンテレフタレート、ポリエチレンテレンテレフタレート、ポリサルフォン、ポリエーテルサルフォン、ポリフェニレンサルファイド、ポリアミドイミド、ポリメチルペンテン、液晶ポリマー、エポキシ樹脂、フェノール樹脂、ユリア樹脂、メラミン樹脂、エポキシ樹脂、ジアリルフタレート樹脂、不飽和ポリエステル樹脂、ポリイミド、ポリウレタン、シリコーン樹脂、又は、これらのいくつかの混合物等を使用することができる。このうち、シリコーン樹脂あるいはエポキシ樹脂を用いて量子ドットを分散した樹脂組成物を形成することが好適である。より好ましくは、シリコーン樹脂を用いて量子ドットを分散した樹脂組成物を形成する。 The wavelength converting substance 3 is preferably formed of a resin composition in which quantum dots are dispersed. Examples of resins include polypropylene, polyethylene, polystyrene, AS resin, ABS resin, methacrylic resin, polyvinyl chloride, polyacetal, polyamide, polycarbonate, modified polyphenylene ether, polybutylene terephthalate, polyethylene terephthalate, polysulfone, polyethersulfone, and polyphenylene sulfide. , Polyamideimide, polymethylpentene, liquid crystal polymer, epoxy resin, phenol resin, urea resin, melamine resin, epoxy resin, diallyl phthalate resin, unsaturated polyester resin, polyimide, polyurethane, silicone resin, or some mixture thereof Etc. can be used. Among these, it is preferable to form a resin composition in which quantum dots are dispersed using a silicone resin or an epoxy resin. More preferably, a resin composition in which quantum dots are dispersed is formed using a silicone resin.
　また、波長変換物質３を構成する樹脂の屈折率は、容器２の屈折率に比べて小さいことが好ましい。例えば、シリコーン樹脂の屈折率は、ナトリウムＤ線、２３℃において、信越化学工業（株）製のＳＣＲ１０１６で１．５２、（株）ダイセル製のＡ２０４５で１．５５、信越化学工業（株）製のＫＥＲ－２５００で１．４１、（株）ダイセル製のＡ１０８０で１．４１である。また、エポキシ樹脂の屈折率は、ナトリウムＤ線、２３℃において、（株）ダイセル製のセルビーナスＷＯ９１７で１．５１、セルビーナスＷＯ９２５で１．５０である。これに対して、ガラスによる容器２の屈折率は、一般的なガラスの場合で１．４５前後であり、高屈折率の光学ガラスの場合で１．５０～１．９０程度である。したがって、波長変換物質３を構成する樹脂及び容器２の材質を適切に選択することにより、波長変換物質３を構成する樹脂の屈折率を、容器２の屈折率に比べて小さくできる。例えば、波長変換物質３を構成する樹脂として屈折率が１．４１のシリコーン樹脂であるＡ１０８０又はＫＥＲ－２５００を用い、容器２を屈折率１．４５のガラスで構成することができる。また別の例として、波長変換物質３を構成する樹脂として屈折率が１．４１～１．５５のシリコーン樹脂又はエポキシ樹脂を用い、容器２を屈折率１．５６以上の高屈折率のガラスで構成することができる。これにより、波長変換物質３内に進入した光の一部が、収納空間５に面する容器２の側壁部分で全反射する。屈折率の小さい媒体側における入射角は、屈折率の大きい媒体側における入射角より大きくなるためである。これにより光が容器２の側方から外部へ漏れる量を減らすことができるので、色変換効率及び発光強度を高めることができる。なお、ここでいう波長変換物質３を構成する樹脂とは、量子ドットを分散するための樹脂に限定されるものではない。 Further, the refractive index of the resin constituting the wavelength converting substance 3 is preferably smaller than the refractive index of the container 2. For example, the refractive index of the silicone resin is 1.52 for SCR1016 manufactured by Shin-Etsu Chemical Co., Ltd., 1.55 for A2045 manufactured by Daicel Corporation, at 23 ° C., sodium D line, manufactured by Shin-Etsu Chemical Co., Ltd. KER-2500 of 1.41 and A1080 manufactured by Daicel Corporation of 1.41. Moreover, the refractive index of an epoxy resin is 1.51 in Cell Venus WO917 made from Daicel Corporation, and 1.50 in Cell Venus WO925 in sodium D line | wire and 23 degreeC. On the other hand, the refractive index of the container 2 made of glass is about 1.45 in the case of general glass, and about 1.50 to 1.90 in the case of optical glass with a high refractive index. Therefore, by appropriately selecting the resin constituting the wavelength converting substance 3 and the material of the container 2, the refractive index of the resin constituting the wavelength converting substance 3 can be made smaller than the refractive index of the container 2. For example, A1080 or KER-2500, which is a silicone resin having a refractive index of 1.41, is used as the resin constituting the wavelength converting substance 3, and the container 2 can be made of glass having a refractive index of 1.45. As another example, a silicone resin or an epoxy resin having a refractive index of 1.41 to 1.55 is used as a resin constituting the wavelength converting substance 3, and the container 2 is made of a high refractive index glass having a refractive index of 1.56 or more. Can be configured. As a result, a part of the light that has entered the wavelength converting substance 3 is totally reflected by the side wall portion of the container 2 facing the storage space 5. This is because the incident angle on the medium side with a small refractive index is larger than the incident angle on the medium side with a large refractive index. Thereby, since the amount of light leaking from the side of the container 2 to the outside can be reduced, the color conversion efficiency and the light emission intensity can be increased. The resin constituting the wavelength converting substance 3 here is not limited to the resin for dispersing the quantum dots.
　また波長変換物質３に含まれる量子ドットの構成及び材質を限定するものではないが、例えば、本実施の形態における量子ドットは、半導体粒子のコアと、コアの周囲を被覆するシェル部とを有することができる。コアには、例えば、ＣｄＳｅが使用されるが、特に材質を限定するものでない。例えば、少なくともＺｎとＣｄとを含有するコア材、Ｚｎ、Ｃｄ、Ｓｅ及びＳを含有するコア材、ＺｎＣｕＩｎＳ、ＣｄＳ、ＣｄＳｅ、ＺｎＳ、ＺｎＳｅ、ＩｎＰ、ＣｄＴｅ、これらのいくつかの複合物等が使用できる。本実施の形態における量子ドットは、シェル部が形成されず、半導体粒子のコア部のみで構成されてもよい。すなわち、量子ドットは、少なくともコア部を備えていれば、シェル部による被覆構造を備えていなくてもよい。例えば、コア部に対して、シェル部の被覆を行った場合、被覆構造となる領域が小さいか被覆部分が薄すぎて被覆構造を分析・確認できないことがある。したがって、分析によるシェル部の有無にかかわらず、量子ドットと判断することができる。 Moreover, although the structure and material of the quantum dot contained in the wavelength conversion substance 3 are not limited, for example, the quantum dot in this Embodiment has the core of a semiconductor particle, and the shell part which coat | covers the circumference | surroundings of a core. be able to. For example, CdSe is used for the core, but the material is not particularly limited. For example, a core material containing at least Zn and Cd, a core material containing Zn, Cd, Se and S, ZnCuInS, CdS, CdSe, ZnS, ZnSe, InP, CdTe, and some composites thereof are used. it can. The quantum dot in this Embodiment may be comprised only by the core part of a semiconductor particle, without forming a shell part. That is, the quantum dot does not need to have a covering structure with a shell part as long as it has at least a core part. For example, when the shell portion is coated on the core portion, the region that becomes the covering structure may be small or the covering portion may be too thin to analyze and confirm the covering structure. Therefore, it can be determined as a quantum dot regardless of the presence or absence of the shell portion by analysis.
　量子ドットとして、例えば、吸収波長が４６０ｎｍ（青色）であって、蛍光波長が約５２０ｎｍ（緑色）の量子ドット及び約６６０ｎｍ（赤色）の量子ドットの２種類が含まれている。このため、光入射面２ａから青色の光が入射されると、それぞれの量子ドットによって、青色の一部が、緑色又は赤色に変換される。これによって、光出射面２ｂから白色の光を得ることができる。しかしながら従来においては、青色光を適切に白色光に変換できなかった。それは、波長変換物質３を充填した収納空間５と側面２ｃとの間の側方領域７（図２参照）を青色光が、光入射面２ａから光出射面２ｂに抜けることで、光出射面２ｂにて青色の波長強度が強く出てしまうためである。 Quantum dots include, for example, two types of quantum dots having an absorption wavelength of 460 nm (blue) and a fluorescence wavelength of about 520 nm (green) and a quantum dot of about 660 nm (red). For this reason, when blue light is incident from the light incident surface 2a, a part of blue is converted into green or red by each quantum dot. Thereby, white light can be obtained from the light emitting surface 2b. However, conventionally, blue light cannot be appropriately converted into white light. This is because the blue light passes through the side region 7 (see FIG. 2) between the storage space 5 filled with the wavelength converting substance 3 and the side surface 2c (see FIG. 2) from the light incident surface 2a to the light emitting surface 2b. This is because the blue wavelength intensity is strong at 2b.
　そこで本実施の形態では、図１、図２に示すように側面２ｃ、２ｃに着色層４、４を設けた。「着色層」とは透明でない層であり、白色を含む色が着色された層を指す。着色層４は、塗料、インク、あるいはテープにより構成されることが好ましい。また着色層４の色を限定するものでないが、白色であることが好適である。したがって白い塗料や白色インクを側面２ｃに塗布したり、白色テープを側面２ｃに貼るだけで簡単に着色層４を形成することができる。また、Ｎｉ、Ａｇ、Ａｌ、Ｃｒ等の金属を蒸着して金属層４とすることもできる。 Therefore, in this embodiment, the colored layers 4 and 4 are provided on the side surfaces 2c and 2c as shown in FIGS. The “colored layer” is a layer that is not transparent, and refers to a layer colored in colors including white. The colored layer 4 is preferably composed of paint, ink, or tape. Moreover, although the color of the colored layer 4 is not limited, it is suitable that it is white. Therefore, the colored layer 4 can be easily formed by simply applying white paint or white ink to the side surface 2c or simply applying a white tape to the side surface 2c. Alternatively, the metal layer 4 can be formed by vapor-depositing a metal such as Ni, Ag, Al, or Cr.
　これにより、側方領域７を通過する光抜けを従来に抑制することができ、従来に比べて色変換を適切かつ高効率に行うことができ、所望の色の光を光出射面２ｂより得ることができる。また本実施の形態によれば、白色光の発光強度を従来と同等あるいそれ以上にすることができる。 As a result, light leakage through the side region 7 can be suppressed conventionally, color conversion can be performed appropriately and efficiently compared to the conventional method, and light of a desired color can be obtained from the light emitting surface 2b. be able to. Further, according to the present embodiment, the emission intensity of white light can be made equal to or higher than that of the prior art.
　図１、図２では着色層４を、容器２の側面２ｃに形成しているが、図３Ａに示すように、着色層４を、容器２の側面２ｃから光出射面２ｂの端部２ｅにかけて形成することができる。あるいは図３Ｂに示すように、着色層４を、光出射面２ｂの端部２ｅにのみ形成することもできる。着色層４は、図２に示すように、容器２の側面２ｃか、図３Ａに示すように、容器２の側面２ｃから光出射面２ｂの端部２ｅにかけて形成されることが好ましい。 In FIG. 1 and FIG. 2, the colored layer 4 is formed on the side surface 2c of the container 2, but as shown in FIG. 3A, the colored layer 4 extends from the side surface 2c of the container 2 to the end 2e of the light emitting surface 2b. Can be formed. Or as shown to FIG. 3B, the colored layer 4 can also be formed only in the edge part 2e of the light-projection surface 2b. The colored layer 4 is preferably formed from the side surface 2c of the container 2 as shown in FIG. 2 or from the side surface 2c of the container 2 to the end 2e of the light emitting surface 2b as shown in FIG. 3A.
　光出射面２ｂの端部２ｅは、収納空間５と側面２ｃとの間の側方領域７に対向している。よって端部２ｅは、波長変換物質３が充填された収納空間５と対向していない。したがって光出射面２ｂの端部２ｅに設けられた着色層４は、波長変換物質３が充填された収納空間５の両側に位置し、収納空間５と対向しないことが好ましいが、光出射面２ｂ上で着色層４が多少長く形成され、収納空間５と一部対向していてもよい。例えば着色層４は、収納空間５の幅の約１／３以下と対向する程度であれば許容範囲に含まれる。 The end 2e of the light exit surface 2b faces the side region 7 between the storage space 5 and the side surface 2c. Therefore, the end 2e does not face the storage space 5 filled with the wavelength converting substance 3. Therefore, the colored layer 4 provided at the end 2e of the light exit surface 2b is preferably located on both sides of the storage space 5 filled with the wavelength converting substance 3 and does not face the storage space 5, but the light exit surface 2b. The colored layer 4 may be formed to be slightly longer and may partially face the storage space 5. For example, the colored layer 4 is included in the allowable range as long as it faces about 1/3 or less of the width of the storage space 5.
　なお着色層４は、側面２ｃあるいは端部２ｅの全面に形成されることが好ましいが、必ずしも全面でなくてもよく、側面２ｃあるいは端部２ｅの一部であってもよい。ただし、側面２ｃあるいは端部２ｅの５０％以上の面積を着色層４で覆うことが好ましい。また、着色層４は、側方領域７の上に形成される代わりに、側方領域７の全部又は一部を着色された材料とすることで形成してもよい。例えば、側方領域７の全部又は一部を、白色のガラス又は白色の樹脂とすることで形成することもできる。 The colored layer 4 is preferably formed on the entire surface of the side surface 2c or the end portion 2e, but may not necessarily be the entire surface, and may be a part of the side surface 2c or the end portion 2e. However, the colored layer 4 preferably covers an area of 50% or more of the side surface 2c or the end 2e. Further, the colored layer 4 may be formed by using all or part of the side region 7 as a colored material instead of being formed on the side region 7. For example, all or part of the side region 7 can be formed by using white glass or white resin.
　図２、図３に示すように、断面形状は、容器２及び収納空間５の外形形状が矩形状であることが好適である。ただし、図４Ａのように、容器２の側面２ｃ及び収納空間５の側壁面が曲面である構成や、楕円状の構成とすることもできる。 As shown in FIGS. 2 and 3, the cross-sectional shape is preferably such that the outer shape of the container 2 and the storage space 5 is rectangular. However, as shown in FIG. 4A, the side surface 2c of the container 2 and the side wall surface of the storage space 5 may be curved or may have an elliptical configuration.
　また、図２、図３では、容器２及び収納空間５の外形形状が正方形であったが、図４Ｂに示すように、容器２及び収納空間５の外形形状を長方形とすることできる。 2 and 3, the outer shape of the container 2 and the storage space 5 is square, but as shown in FIG. 4B, the outer shape of the container 2 and the storage space 5 can be rectangular.
　なお曲面を含む断面形状よりも、図２や図４Ｂに示すように、矩形状であることで、本実施の形態の着色層４を設けた効果（適切かつ高効率に色変換でき、従来に比べて所望の色の光を得ることができる）を適切に発揮させることができる。 In addition, as shown in FIG.2 and FIG.4B rather than the cross-sectional shape containing a curved surface, the effect which provided the colored layer 4 of this Embodiment (color conversion can be carried out appropriately and efficiently, as shown in FIG. In comparison, the desired color light can be obtained).
　また図２、図３及び図４Ａ、図４Ｂでは、容器２及び収納空間５の断面の外形形状を互いに相似形状としているが、図４Ｃに示すように、容器２の断面の外形形状と収納空間５の断面の外形形状とを異ならせることもできる。例えば図４Ｃでは、容器２の断面の外形形状が矩形状であり、収納空間５の断面の外形形状が六角形である。ただし、容器２及び収納空間５の断面の外形形状を互いに相似形状とすることが、本実施の形態の着色層４を設けた効果（適切かつ高効率に色変換でき、従来に比べて所望の色の光を得ることができる）を適切に発揮させることができ好ましい。また図４Ｄに示すように、容器２及び収納空間５の断面の外形形状を、それぞれ互いに相似の台形状にすることができる。例えば図４Ｄでは、台形の短辺側を光入射面２ａとし、長辺側を光出射面２ｂとしている。これにより、光源から放出された光を、所定の大きさに拡大することができる。また、他の例として、図４Ｄとは逆に、台形の長辺側を光入射面２ａとし、短辺側を光出射面２ｂとしてもよい。これにより、光源から放出された光を、所定の大きさに集光することができる。また、容器２及び収納空間５の断面の外形形状は、図４Ｄとは異なり、台形の上底と下底との中心を通る中心線に対して、側面が互いに線対称の位置に形成されていてもよい。 2, 3, 4 </ b> A, and 4 </ b> B, the outer shapes of the cross section of the container 2 and the storage space 5 are similar to each other, but as shown in FIG. 4C, the outer shape of the cross section of the container 2 and the storage space It is also possible to make the outer shape of the cross section of 5 different. For example, in FIG. 4C, the outer shape of the cross section of the container 2 is a rectangular shape, and the outer shape of the cross section of the storage space 5 is a hexagon. However, making the outer shape of the cross section of the container 2 and the storage space 5 similar to each other has the effect of providing the colored layer 4 of the present embodiment (color conversion can be performed appropriately and efficiently, and desired as compared with the prior art. Color light) can be appropriately exhibited, which is preferable. Moreover, as shown to FIG. 4D, the external shape of the cross section of the container 2 and the storage space 5 can be made into a trapezoid shape similar to each other. For example, in FIG. 4D, the shorter side of the trapezoid is the light incident surface 2a, and the longer side is the light emitting surface 2b. Thereby, the light emitted from the light source can be enlarged to a predetermined size. As another example, contrary to FIG. 4D, the long side of the trapezoid may be the light incident surface 2a and the short side may be the light emitting surface 2b. Thereby, the light emitted from the light source can be condensed to a predetermined size. Further, the outer shapes of the cross sections of the container 2 and the storage space 5 are different from those in FIG. 4D, and the side surfaces are formed symmetrically with respect to the center line passing through the centers of the upper base and the lower base of the trapezoid. May be.
　また図２、図３、及び図４の各図において、光入射面及び光出射面は平面で形成されているが、光入射面及び光出射面のいずれか一方、又は、双方が曲面で形成されてもよい。また、図２、図３、図４Ｂ～図４Ｄの各図において、容器２の側面は平面で形成されているが、側面が曲面で形成されてもよい。また各辺の間の角をＲ形状にしてもよい。すなわち、矩形状、六角形、台形状などの表現は、幾何学的に正確な四角形、六角形、台形などに限られるものではなく、これらを構成する線及び角度が、歪を有し、又は、誤差を含むものも含まれる。これらにより、放出される光の方向を調節することができる。 2, 3 and 4, the light incident surface and the light exit surface are formed as flat surfaces, but either one of the light incident surface and the light exit surface or both are formed as curved surfaces. May be. Further, in each of FIGS. 2, 3, and 4B to 4D, the side surface of the container 2 is formed as a flat surface, but the side surface may be formed as a curved surface. The corners between the sides may be R-shaped. In other words, expressions such as a rectangular shape, a hexagonal shape, and a trapezoidal shape are not limited to geometrically accurate quadrangular shapes, hexagonal shapes, trapezoidal shapes, etc., and lines and angles constituting these have distortions, or Including errors are also included. By these, the direction of the emitted light can be adjusted.
　なお図４の各図ではいずれも着色層４を容器２の側面２ｃに形成しているが、図３Ａのように、着色層４を容器２の側面２ｃ上から光出射面２ｂの端部２ｅ上にかけて、あるいは図３Ｂのように、光出射面２ｂの端部２ｅ上に設けることもできる。 In each drawing of FIG. 4, the colored layer 4 is formed on the side surface 2c of the container 2, but the colored layer 4 is formed on the side surface 2c of the container 2 from the side 2c of the container 2 as shown in FIG. 3A. It can also be provided on the end 2e of the light exit surface 2b as shown in FIG. 3B.
　また上記では、いずれも着色層４を容器２の外面に形成していたが、図５に示すように、着色層４を内部空間５の壁面５ａに形成することもできる。着色層４を形成する壁面５ａは、容器２の側面２ｃと対向した位置にある。 In each of the above, the colored layer 4 is formed on the outer surface of the container 2, but the colored layer 4 can also be formed on the wall surface 5a of the internal space 5, as shown in FIG. The wall surface 5 a that forms the colored layer 4 is located at a position facing the side surface 2 c of the container 2.
　あるいは、図６に示すように、容器２の側面２ｃと内部空間５との間の容器２の側部２ｄそのものを着色層４とすることができる。係る場合、容器２の成形を二色成形し、このとき、容器２の側部２ｄとなる部分には着色した樹脂を用いる。あるいは、容器２の側部２ｄと、それ以外の部分とを接着等で接合し図６に示す容器２を形成することもできる。なお、図５、図６において、図２、図３と同じ符号は、図２、図３と同じ部分を示している。 Alternatively, as shown in FIG. 6, the side portion 2 d of the container 2 between the side surface 2 c of the container 2 and the internal space 5 can be a colored layer 4. In such a case, the container 2 is molded in two colors, and at this time, a colored resin is used for a portion to be the side portion 2d of the container 2. Alternatively, the container 2 shown in FIG. 6 can be formed by bonding the side part 2d of the container 2 and other parts by bonding or the like. 5 and 6, the same reference numerals as those in FIGS. 2 and 3 indicate the same parts as those in FIGS.
　図１に示す波長変換部材１を、図７に示すように、ＬＥＤ等の発光素子１０と導光板１２との間に介在させることができる。ここで波長変換部材１と発光素子１０とを組み合わせたものが、発光装置であり、さらに発光装置に導光板１２を加えて光源装置が構成される。あるいは、波長変換部材１と導光板１２とを組み合わせて導光部材を構成することもできる。図７に示す発光装置は、例えば、液晶ディスプレイの白色面光源として用いることができる。 The wavelength conversion member 1 shown in FIG. 1 can be interposed between a light emitting element 10 such as an LED and a light guide plate 12 as shown in FIG. Here, a combination of the wavelength conversion member 1 and the light emitting element 10 is a light emitting device, and a light source plate 12 is added to the light emitting device to constitute a light source device. Alternatively, the light guide member can be configured by combining the wavelength conversion member 1 and the light guide plate 12. The light emitting device shown in FIG. 7 can be used as a white surface light source of a liquid crystal display, for example.
　図７に示す構成により、発光素子１０から発せられた光は、波長変換部材１の光入射面２ａから入射され、波長変換物質３（図１参照）にて波長変換され、波長変換された光が光出射面２ｂから導光板１２に出射される。図１に示す図面では、波長変換部材１を構成する容器２の側面２ｃに形成された着色層４は上下面に現れる。本実施の形態では、着色層４を設けたことで、発光素子１０からの光源光が波長変換部材１の側方領域を波長変換されずに通り抜ける割合を減らすことができ、従来に比べて、所望の色の光を光出射面２ｂから得ることができる。例えば所望の色の発光光とは白色光であり、図７に示す発光装置や光源装置は白色光を従来に比べて効果的に発光させることができ装置としての信頼度を高めることができる。 With the configuration shown in FIG. 7, light emitted from the light emitting element 10 is incident from the light incident surface 2 a of the wavelength conversion member 1, wavelength-converted by the wavelength conversion material 3 (see FIG. 1), and wavelength-converted light. Is emitted from the light exit surface 2b to the light guide plate 12. In the drawing shown in FIG. 1, the colored layer 4 formed on the side surface 2c of the container 2 constituting the wavelength conversion member 1 appears on the upper and lower surfaces. In the present embodiment, by providing the colored layer 4, it is possible to reduce the rate at which the light source light from the light emitting element 10 passes through the side region of the wavelength conversion member 1 without wavelength conversion. Light of a desired color can be obtained from the light emitting surface 2b. For example, the desired color of emitted light is white light, and the light-emitting device and the light source device shown in FIG. 7 can emit white light more effectively than conventional ones, and can improve the reliability of the device.
　図８は、本発明における第２の実施の形態を示す波長変換部材を備えた発光素子の分解斜視図である。図９は、図８に示す波長変換部材を組み合せた状態で、Ｂ－Ｂ線に沿って高さ方向に切断し矢印方向から見た拡大縦断面図である。図１０は、図８に示す発光素子の各部材を組み合わせた状態で、図８に示すＢ－Ｂ線に沿って高さ方向に切断し矢印方向から見た発光素子の縦断面図である。 FIG. 8 is an exploded perspective view of a light-emitting element provided with a wavelength conversion member according to the second embodiment of the present invention. FIG. 9 is an enlarged longitudinal sectional view taken along the line BB in the height direction and viewed from the arrow direction in a state where the wavelength conversion members shown in FIG. 8 are combined. FIG. 10 is a longitudinal cross-sectional view of the light-emitting element as viewed from the direction of the arrow, cut in the height direction along the line BB shown in FIG. 8 in a state where the members of the light-emitting element shown in FIG. 8 are combined.
　図８、図１０に示す発光素子２０は、波長変換部材２１と、ＬＥＤチップ（発光チップ）２２とを有して構成される。波長変換部材２１は、容器本体２３と蓋体２４との複数ピースで構成された容器２５を備える。また図８、図９、図１０に示すように、容器本体２３の中央部には有底の収納空間２６が形成されている。そして波長変換物質２７が収納空間２６に充填されている。蓋体２４が容器本体２３上に図示しない接着層を介して接合される。また、容器２５の側面２５ｃに着色層２８が形成される。 8 and 10 includes a wavelength converting member 21 and an LED chip (light emitting chip) 22. The wavelength conversion member 21 includes a container 25 formed of a plurality of pieces of a container main body 23 and a lid body 24. As shown in FIGS. 8, 9, and 10, a bottomed storage space 26 is formed at the center of the container body 23. The wavelength conversion substance 27 is filled in the storage space 26. The lid body 24 is joined to the container body 23 via an adhesive layer (not shown). Further, the colored layer 28 is formed on the side surface 25 c of the container 25.
　図８、図９、図１０に示す波長変換部材２１の容器２５の下面が光入射面２５ａである。光入射面２５ａに対向する上面が光出射面２５ｂである。 8, 9, and 10, the lower surface of the container 25 of the wavelength conversion member 21 is a light incident surface 25 a. The upper surface facing the light incident surface 25a is the light emitting surface 25b.
　図８、図９、図１０に示す波長変換部材２１の容器２５に設けられた側面２５ｃに対して内側の位置に収納空間２６が形成されている。図９では、図８のＢ－Ｂ線での切断面に現れる側面２５ｃを図示したが、Ｂ－Ｂ線での切断面に現れない他の２つの側面２５ｃ（図８に示す正面側と裏面側）にも同様に着色層２８を形成することが好適である。なお、光の指向性により、ある側面２５ｃに着色層２８を設けることが効果的であれば、ある側面２５ｃ上にのみ着色層２８を設け、他の側面２５ｃに着色層２８を設けなくてもよい。ただし、好ましくは全ての側面２５ｃ上に着色層２８を設けることである。 A storage space 26 is formed at a position inside the side surface 25c provided in the container 25 of the wavelength conversion member 21 shown in FIGS. 9 shows the side surface 25c that appears on the cut surface along the line BB in FIG. 8, but the other two side surfaces 25c that do not appear on the cut surface along the line BB (the front side and the back surface shown in FIG. 8). Similarly, it is preferable to form the colored layer 28 on the side). If it is effective to provide the colored layer 28 on a certain side surface 25c due to the directivity of light, the colored layer 28 may be provided only on the certain side surface 25c and the colored layer 28 may not be provided on the other side surface 25c. Good. However, it is preferable to provide the colored layer 28 on all the side surfaces 25c.
　図１０に示すように、ＬＥＤチップ２２は、プリント配線基板２９に接続され、図８、図１０に示すようにＬＥＤチップ２２の周囲が枠体３０に囲まれている。そして、枠体３０内は樹脂層３１で封止されている。 As shown in FIG. 10, the LED chip 22 is connected to a printed wiring board 29, and the periphery of the LED chip 22 is surrounded by a frame 30 as shown in FIGS. The inside of the frame 30 is sealed with a resin layer 31.
　図１０に示すように、波長変換部材２１が枠体３０の上面に図示しない接着層を介して接合されてＬＥＤ等の発光素子２０が構成される。 As shown in FIG. 10, the wavelength conversion member 21 is joined to the upper surface of the frame body 30 via an adhesive layer (not shown) to form a light emitting element 20 such as an LED.
　図１１Ａに示すように、着色層２８は、波長変換部材２１の容器２５の側面２５ｃ上から光出射面２５ｂの端部２５ｅ上にかけて形成されてもよい。また図１１Ｂに示すように、着色層２８は、光出射面２５ｂの端部２５ｅ上にのみ形成されてもよい。 As shown in FIG. 11A, the colored layer 28 may be formed from the side surface 25c of the container 25 of the wavelength conversion member 21 to the end portion 25e of the light emitting surface 25b. Further, as shown in FIG. 11B, the colored layer 28 may be formed only on the end portion 25e of the light emitting surface 25b.
　図１２は、図８に示す発光素子を用いた表示装置の縦断面図である。図１２に示すように表示装置５０は、複数の発光素子２０（ＬＥＤ）と、各発光素子２０に対向する液晶ディスプレイ等の表示部５４とを有して構成される。各発光素子２０は、表示部５４の裏面側に配置される。 FIG. 12 is a longitudinal sectional view of a display device using the light emitting element shown in FIG. As shown in FIG. 12, the display device 50 includes a plurality of light emitting elements 20 (LEDs) and a display unit 54 such as a liquid crystal display facing the light emitting elements 20. Each light emitting element 20 is disposed on the back side of the display unit 54.
　複数の発光素子２０は支持体５２に支持されている。各発光素子２０は、所定の間隔を空けて配列されている。各発光素子２０と支持体５２とで表示部５４に対するバックライト５５を構成している。支持体５２はシート状や板状、あるいはケース状である等、特に形状や材質を限定するものでない。 The plurality of light emitting elements 20 are supported by the support body 52. The light emitting elements 20 are arranged at a predetermined interval. Each light emitting element 20 and the support 52 constitute a backlight 55 for the display unit 54. The support 52 is not particularly limited in shape or material such as a sheet shape, a plate shape, or a case shape.
　図１２に示すように、バックライト５５と表示部５４との間には、光拡散板５３等が介在している。 As shown in FIG. 12, a light diffusion plate 53 or the like is interposed between the backlight 55 and the display unit 54.
　図８、図１０に示す発光素子２０と図７に示す導光板１２とを組み合わせて光源装置を構成することができる。あるいは、図７に示す発光装置（発光素子と、キャピラリ状の波長変換部材１と導光板１２等を備える）を図１２に示す表示部５４の裏面側に配置し（光拡散板５３等の介在は任意である）、表示装置５０を構成してもよい。 8 and 10 can be combined with the light guide plate 12 shown in FIG. 7 to constitute a light source device. Alternatively, the light-emitting device (including the light-emitting element, the capillary-shaped wavelength conversion member 1, the light guide plate 12, and the like) shown in FIG. 7 is disposed on the back side of the display unit 54 shown in FIG. The display device 50 may be configured.
　また本実施の形態の波長変換部材や発光素子を、上記に示した光源装置や表示装置以外に、その他の形態の光源装置、照明装置、光拡散装置、光反射装置等にも適用することができる。 In addition to the light source device and the display device described above, the wavelength conversion member and the light emitting element of the present embodiment can be applied to other types of light source devices, illumination devices, light diffusion devices, light reflection devices, and the like. it can.
　以下、本発明の効果を明確にするために実施した実施例及び比較例により本発明を詳細に説明する。なお、本発明は、以下の実施例によって何ら限定されるものではない。 Hereinafter, the present invention will be described in detail with reference to examples and comparative examples implemented in order to clarify the effects of the present invention. In addition, this invention is not limited at all by the following examples.
［キャピラリ］
　内寸０．５ｍｍ×０．５ｍｍ角型ガラスキャピラリ（図１、図２参照）
［量子ドット］
　コア／シェル構造の赤色発光量子ドット（ＱＹ値；８３％）と緑色発光量子ドット（ＱＹ値８０％、８１％）
［量子ドットに対する分散樹脂］
　シリコーン樹脂
　エポキシ樹脂
［キャピラリへの樹脂封入］
　真空引きで封入
［全光束測定］
　キャピラリを導光板の底に貼り付けて測定した。その際、光源として４５０ｎｍ波長ＬＥＤ（駆動２０ｍＡ）を３個点灯させた。そして、分光器としてＡＳＥＮＳＥＴＥＫ　ｌｉｇｈｔｉｎｇ　Ｐａｓｓｐｏｒｔを用いた。 [Capillary]
Inner size 0.5 mm x 0.5 mm square glass capillary (see Figs. 1 and 2)
[Quantum dots]
Core / shell structure red light emitting quantum dots (QY value; 83%) and green light emitting quantum dots (QY value 80%, 81%)
[Dispersion resin for quantum dots]
Silicone resin Epoxy resin [Resin encapsulated in capillary]
Enclosed by vacuum [total luminous flux measurement]
Measurement was performed by attaching a capillary to the bottom of the light guide plate. At that time, three 450 nm wavelength LEDs (drive 20 mA) were turned on as light sources. As a spectroscope, ASENSETEK lighting Passport was used.
［試料１］
　量子ドットに対する分散樹脂としてシリコーン樹脂を用い、量子ドットが分散されたシリコーン樹脂をキャピラリへ封入した。なお、量子ドット濃度は、吸光度が１５％となる濃度とした。
［試料２］
　量子ドットに対する分散樹脂としてエポキシ樹脂を用い、量子ドットが分散されたエポキシ樹脂をキャピラリへ封入した。なお、量子ドット濃度は、吸光度が１５％となる濃度とした。 [Sample 1]
A silicone resin was used as a dispersion resin for the quantum dots, and the silicone resin in which the quantum dots were dispersed was sealed in a capillary. The quantum dot concentration was set to a concentration at which the absorbance was 15%.
[Sample 2]
An epoxy resin was used as a dispersion resin for the quantum dots, and the epoxy resin in which the quantum dots were dispersed was sealed in a capillary. The quantum dot concentration was set to a concentration at which the absorbance was 15%.
［実施例１］
　実施例１では、試料１を用い、キャピラリにペイントを塗布していない波長変換部材（以下、「ｎｏｎｅ＿１」という）、キャピラリの光出射面の端部に白色ペイントを塗布した波長変換部材（以下、「ｔｏｐ＿１」という）、キャピラリの光出射面の側面に白色ペイントを塗布した波長変換部材（以下、「ｓｉｄｅ＿１」という）、キャピラリの光出射面の側面上から光出射面の端部上にかけて白色ペイントを塗布した波長変換部材（以下、「ｓｉｄｅ＋ｔｏｐ＿１」という）を用意した。 [Example 1]
In Example 1, the sample 1 was used, a wavelength conversion member (hereinafter referred to as “none_1”) in which no paint was applied to the capillary, and a wavelength conversion member (hereinafter, referred to as “none_1”) in which white paint was applied to the end of the light emission surface of the capillary. "Top_1"), a wavelength conversion member (hereinafter referred to as "side_1") coated with white paint on the side of the light exit surface of the capillary, white paint from the side of the light exit surface of the capillary to the end of the light exit surface The wavelength conversion member (henceforth "side + top_1") which apply | coated was prepared.
　そして、導光板の表面（光出射面）側から発せられる光の発光スペクトル、及び色度図を求めた。その実験結果が、図１３及び図１４に示されている。 Then, the emission spectrum and chromaticity diagram of light emitted from the surface (light emitting surface) side of the light guide plate were obtained. The experimental results are shown in FIG. 13 and FIG.
　図１３に示すように、ｎｏｎｅ＿１では、波長約４５０ｎｍ（青色）に大きなピークが見られた。白色ペイントを施すことで、波長約４５０ｎｍ（青色）でのピークを抑えることができるとわかった。特に、ｓｉｄｅ＿１あるいは、ｓｉｄｅ＋ｔｏｐ＿１とすることで、効果的に、波長約４５０ｎｍ（青色）でのピークを抑えることができるとわかった。 As shown in FIG. 13, in none_1, a large peak was observed at a wavelength of about 450 nm (blue). It was found that the peak at a wavelength of about 450 nm (blue) can be suppressed by applying white paint. In particular, it was found that the peak at a wavelength of about 450 nm (blue) can be effectively suppressed by setting side_1 or side + top_1.
　続いて、図１４の色度図に示すように、ｎｏｎｅ＿１が青色で、ｓｉｄｅ＿１及びｓｉｄｅ＋ｔｏｐ＿１は白色あるいは白色に近く、ｔｏｐ＿１は、ｎｏｎｅ＿１とｓｉｄｅ＿１との間の色合いになることがわかった。 Subsequently, as shown in the chromaticity diagram of FIG. 14, it was found that none_1 is blue, side_1 and side + top_1 are white or close to white, and top_1 has a hue between none_1 and side_1.
　このように、ｔｏｐ＿１、ｓｉｄｅ＿１及びｓｉｄｅ＋ｔｏｐ＿１では白色ペイントにより光入射面から光出射面への側方領域からの青色の光抜けが抑えられることで、光出射面での合成孔は従来（ｎｏｎｅ＿１）よりも青みを抑えることができ、特に、ｓｉｄｅ＿１及びｓｉｄｅ＋ｔｏｐ＿１では白色あるいは白色に近い光を得ることができた。しかも、ｔｏｐ＿１、ｓｉｄｅ＿１及びｓｉｄｅ＋ｔｏｐ＿１ではいずれもｎｏｎｅ＿１と同等以上の白色光の発光強度を得ることができ、特にｓｉｄｅ＿１の場合はｎｏｎｅ＿１よりも白色光の発光強度の増大が顕著に見られた。 As described above, in top_1, side_1, and side + top_1, the white paint suppresses blue light leakage from the side region from the light incident surface to the light emitting surface, so that the synthetic hole on the light emitting surface is conventional (none_1). In particular, side_1 and side + top_1 were able to obtain white light or near-white light. Moreover, all of top_1, side_1, and side + top_1 were able to obtain white light emission intensity equal to or higher than that of none_1. In particular, in the case of side_1, the increase in the light emission intensity of white light was more noticeable than that of none_1.
［実施例２］
　実施例２では、試料１を用い、キャピラリにペイントを塗布していない波長変換部材（以下、「ｎｏｎｅ＿２」という）、キャピラリの光出射面の端部に銀色ペイントを塗布した波長変換部材（ｔｏｐ＿２）、キャピラリの光出射面の側面に銀色ペイントを塗布した波長変換部材（ｓｉｄｅ＿２）、キャピラリの光出射面の側面上から光出射面の端部上にかけて銀色ペイントを塗布した波長変換部材（ｓｉｄｅ＋ｔｏｐ＿２）を用意した。 [Example 2]
In Example 2, a wavelength conversion member (hereinafter referred to as “none_2”) in which the sample 1 is used and no paint is applied to the capillary, and a wavelength conversion member (top_2) in which silver paint is applied to the end of the light emission surface of the capillary A wavelength converting member (side_2) coated with silver paint on the side of the light emitting surface of the capillary, and a wavelength converting member (side + top_2) coated with silver paint from the side of the light emitting surface of the capillary to the end of the light emitting surface. Prepared.
　そして、導光板の表面（光出射面）側から発せられる光の発光スペクトル、及び色度図を求めた。その実験結果が、図１５及び図１６に示されている。 Then, the emission spectrum and chromaticity diagram of light emitted from the surface (light emitting surface) side of the light guide plate were obtained. The experimental results are shown in FIG. 15 and FIG.
　図１５に示すように、ｎｏｎｅ＿２では、波長約４５０ｎｍ（青色）に大きなピークが見られた。一方、銀色ペイントを施すことで、特に、ｔｏｐ＿２や、ｓｉｄｅ＋ｔｏｐ＿２とすることで、効果的に、波長約４５０ｎｍ（青色）でのピークを抑えることができるとわかった。 As shown in FIG. 15, in none_2, a large peak was observed at a wavelength of about 450 nm (blue). On the other hand, it has been found that the peak at a wavelength of about 450 nm (blue) can be effectively suppressed by applying silver paint, particularly by setting top_2 or side + top_2.
　図１６の色度図を見ると、銀色ペイントを施すことで、いずれもｎｏｎｅ＿２より青色が弱まり、白色に近くなる。本実施の形態では、白色ペイントを施した実施例１の方が、実施例２よりも効果が大きかった。 Referring to the chromaticity diagram of FIG. 16, by applying silver paint, blue is weaker than none_2 and close to white. In the present embodiment, the effect of Example 1 with white paint was greater than that of Example 2.
［実施例３］
　実施例３では、試料２を用い、キャピラリにペイントを塗布していない波長変換部材（ｎｏｎｅ＿３）、キャピラリの光出射面の端部に白色ペイントを塗布した波長変換部材（ｔｏｐ＿３）、キャピラリの光出射面の側面に白色ペイントを塗布した波長変換部材（ｓｉｄｅ＿３）、キャピラリの光出射面の側面上から光出射面の端部上にかけて白色ペイントを塗布した波長変換部材（ｓｉｄｅ＋ｔｏｐ＿３）を用意した。 [Example 3]
In Example 3, the sample 2 was used, a wavelength conversion member (none_3) in which no paint was applied to the capillary, a wavelength conversion member (top_3) in which white paint was applied to the end of the light output surface of the capillary, and light output from the capillary A wavelength converting member (side_3) coated with white paint on the side surface of the surface and a wavelength converting member (side + top_3) coated with white paint from the side surface of the light emitting surface of the capillary to the end of the light emitting surface were prepared.
　そして、導光板の表面（光出射面）側から発せられる光の発光スペクトル、及び色度図を求めた。その実験結果が、図１７及び図１８に示されている。 Then, the emission spectrum and chromaticity diagram of light emitted from the surface (light emitting surface) side of the light guide plate were obtained. The experimental results are shown in FIGS.
　図１７に示すように、ｎｏｎｅ＿３では、波長約４５０ｎｍ（青色）に大きなピークが見られた。白色ペイントを施すことで、波長約４５０ｎｍ（青色）でのピークを抑えることができるがわかった。 As shown in FIG. 17, in none_3, a large peak was observed at a wavelength of about 450 nm (blue). It was found that the peak at a wavelength of about 450 nm (blue) can be suppressed by applying white paint.
　続いて、図１８の色度図に示すように、白色ペイントを施すことで、いずれもｎｏｎｅ＿３より青色が弱まり、白色に近くなるが、分散樹脂としてシリコーン樹脂を用いたほうが（図１４参照）、エポキシ樹脂を用いるよりも、青色を抑制でき、より白色に近づけることができるとわかった。 Subsequently, as shown in the chromaticity diagram of FIG. 18, by applying white paint, blue is weaker than none_3 and close to white, but it is better to use a silicone resin as the dispersion resin (see FIG. 14). It has been found that blue can be suppressed and white can be made closer than when an epoxy resin is used.
［試料３］
　量子ドットに対する分散樹脂としてエポキシ樹脂を用い、量子ドットが分散されたエポキシ樹脂をキャピラリへ封入した。分散樹脂中の量子ドットの濃度を吸光度が２０％となる濃度とした。
［試料４］
　量子ドットに対する分散樹脂としてエポキシ樹脂を用い、量子ドットが分散されたエポキシ樹脂をキャピラリへ封入した。分散樹脂中の量子ドットの濃度を吸光度が３０％となる濃度とした。
［試料５］
　量子ドットに対する分散樹脂としてシリコーン樹脂を用い、量子ドットが分散されたシリコーン樹脂をキャピラリへ封入した。分散樹脂中の量子ドットの濃度を吸光度が２０％となる濃度とした。 [Sample 3]
An epoxy resin was used as a dispersion resin for the quantum dots, and the epoxy resin in which the quantum dots were dispersed was sealed in a capillary. The density | concentration of the quantum dot in dispersion resin was made into the density | concentration which becomes 20% of light absorbency.
[Sample 4]
An epoxy resin was used as a dispersion resin for the quantum dots, and the epoxy resin in which the quantum dots were dispersed was sealed in a capillary. The density | concentration of the quantum dot in dispersion resin was made into the density | concentration used as a light absorbency 30%.
[Sample 5]
A silicone resin was used as a dispersion resin for the quantum dots, and the silicone resin in which the quantum dots were dispersed was sealed in a capillary. The density | concentration of the quantum dot in dispersion resin was made into the density | concentration which becomes 20% of light absorbency.
［比較例１］
　比較例１では、試料３を用い、キャピラリにペイントを塗布していない波長変換部材を用意した。そして光束測定を行った測定結果が以下の表１に示されている。 [Comparative Example 1]
In Comparative Example 1, a sample 3 was used and a wavelength conversion member in which paint was not applied to the capillary was prepared. The measurement results obtained by measuring the luminous flux are shown in Table 1 below.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
［比較例２］
　比較例２では、試料４を用い、キャピラリにペイントを塗布していない波長変換部材を用意した。そして光束測定を行った測定結果が以下の表２に示されている。 [Comparative Example 2]
In Comparative Example 2, a sample 4 was used and a wavelength conversion member in which no paint was applied to the capillary was prepared. The measurement results obtained by measuring the luminous flux are shown in Table 2 below.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
［実施例３～５］
　実施例３～５では、夫々試料１を用い、キャピラリの側面に白色ペイントを塗布した波長変換部材を用意した。そして光束測定を行う測定位置を実施例３～５で変えた。実施例４は導光板の中央付近、実施例３、及び実施例５はその両側位置を測定位置とした。 [Examples 3 to 5]
In Examples 3 to 5, wavelength conversion members were prepared by using Sample 1 and applying white paint to the side surfaces of the capillaries. The measurement position at which the light flux measurement was performed was changed in Examples 3-5. Example 4 was set as the measurement position in the vicinity of the center of the light guide plate, and Examples 3 and 5 were positioned on both sides thereof.
　実施例３の測定結果が、以下の表３に、実施例４の測定結果が、以下の表４に、実施例５の測定結果が、以下の表５に、夫々示されている。 The measurement results of Example 3 are shown in Table 3 below, the measurement results of Example 4 are shown in Table 4, and the measurement results of Example 5 are shown in Table 5 below.
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000005
Figure JPOXMLDOC01-appb-T000005
［実施例６～８］
　実施例６～８では、夫々試料５を用い、キャピラリの側面に白色ペイントを塗布した波長変換部材を用意した。そして光束測定を行う測定位置を実施例６～８で変えた。実施例７は導光板の中央付近、実施例６、及び実施例８はその両側位置を測定位置とした。 [Examples 6 to 8]
In Examples 6 to 8, wavelength conversion members were prepared using Sample 5 and applying white paint to the side surfaces of the capillaries. The measurement position at which the light flux measurement was performed was changed in Examples 6-8. In Example 7, the vicinity of the center of the light guide plate was used, and in Examples 6 and 8, both side positions thereof were set as measurement positions.
　実施例６の測定結果が、以下の表６に、実施例７の測定結果が、以下の表７に、実施例８の測定結果が、以下の表８に、夫々示されている。 The measurement results of Example 6 are shown in Table 6 below, the measurement results of Example 7 are shown in Table 7, and the measurement results of Example 8 are shown in Table 8 below.
Figure JPOXMLDOC01-appb-T000006
Figure JPOXMLDOC01-appb-T000006
Figure JPOXMLDOC01-appb-T000007
Figure JPOXMLDOC01-appb-T000007
Figure JPOXMLDOC01-appb-T000008
Figure JPOXMLDOC01-appb-T000008
　上記の実験結果により、実施例では、色度図のｘ座標を０．３０～０．４０、ｙ座標を０．３５～０４５、かつ、色温度を４０００Ｋ～６５００Ｋ程度にできることがわかった。 From the above experimental results, it was found that the x coordinate of the chromaticity diagram can be 0.30 to 0.40, the y coordinate can be 0.35 to 045, and the color temperature can be about 4000 K to 6500 K in the example.
　本発明では、容器内に波長変換物質を封入した波長変換部材を用いて、ＬＥＤやバックライト装置、表示装置等を実現できる。本発明の波長変換部材によれば、色変換を適切かつ高効率に行うことができるので、本発明の波長変換部材を用いたＬＥＤ、バックライト装置、表示装置等の消費電力を低減することができる。 In the present invention, an LED, a backlight device, a display device, or the like can be realized using a wavelength conversion member in which a wavelength conversion substance is sealed in a container. According to the wavelength conversion member of the present invention, since color conversion can be performed appropriately and with high efficiency, it is possible to reduce power consumption of an LED, a backlight device, a display device, and the like using the wavelength conversion member of the present invention. it can.
　本出願は、２０１４年８月２２日出願の特願２０１４－１６９５３１に基づく。この内容は全てここに含めておく。 This application is based on Japanese Patent Application No. 2014-169531 filed on Aug. 22, 2014. All this content is included here.

Claims (14)

  1. 　第１の面、前記第１の面に対向する第２の面、及び、前記第１の面と前記第２の面との間を繋ぐ側面を備え、前記側面よりも内側に収納空間が設けられた容器と、
    　前記収納空間内に配置された波長変換物質と、
    　前記側面上、前記第２の面の端部上、又は、前記側面上から前記第２の端部上にかけて形成された着色層と、
    　を有することを特徴とする波長変換部材。     A first surface, a second surface facing the first surface, and a side surface connecting the first surface and the second surface, and a storage space is provided inside the side surface A container,
    A wavelength converting substance disposed in the storage space;
    A colored layer formed on the side surface, on an end portion of the second surface, or on the side surface to the second end portion;
    A wavelength conversion member comprising:
  2. 　第１の面、前記第１の面に対向する第２の面、及び、前記第１の面と前記第２の面との間を繋ぐ側面を備え、前記側面よりも内側に収納空間が設けられた容器と、
    　前記収納空間内に配置された波長変換物質と、
    　前記収納空間の壁面に形成された着色層と、
    　を有することを特徴とする波長変換部材。     A first surface, a second surface facing the first surface, and a side surface connecting the first surface and the second surface, and a storage space is provided inside the side surface A container,
    A wavelength converting substance disposed in the storage space;
    A colored layer formed on the wall surface of the storage space;
    A wavelength conversion member comprising:
  3. 　第１の面、前記第１の面に対向する第２の面、及び、前記第１の面と前記第２の面との間を繋ぐ側面を備え、前記側面よりも内側に収納空間が設けられた容器と、
    　前記収納空間内に配置された波長変換物質と、
    　前記容器の前記側面と前記収納空間までの間に設けられた着色層と、
    　を有することを特徴とする波長変換部材。     A first surface, a second surface facing the first surface, and a side surface connecting the first surface and the second surface, and a storage space is provided inside the side surface A container,
    A wavelength converting substance disposed in the storage space;
    A colored layer provided between the side surface of the container and the storage space;
    A wavelength conversion member comprising:
  4. 　前記波長変換物質は、量子ドットを含むことを特徴とする請求項１ないし３のいずれかに記載の波長変換部材。 The wavelength conversion member according to any one of claims 1 to 3, wherein the wavelength conversion substance includes quantum dots.
  5. 　前記波長変換物質は、前記量子ドットを分散した樹脂組成物により形成されることを特徴とする請求項４に記載の波長変換部材。 The wavelength conversion member according to claim 4, wherein the wavelength conversion substance is formed of a resin composition in which the quantum dots are dispersed.
  6. 　前記波長変換物質は、前記量子ドットをシリコーン樹脂に分散した樹脂組成物により形成されることを特徴とする請求項５に記載の波長変換部材。 The wavelength converting member according to claim 5, wherein the wavelength converting substance is formed of a resin composition in which the quantum dots are dispersed in a silicone resin.
  7. 　前記第１の面及び前記第２の面の、少なくともいずれか一方に垂直な平面で切断した、前記収納空間及び前記容器の外形断面は、いずれも矩形状であることを特徴とする請求項１ないし６のいずれかに記載の波長変換部材。 The outer cross section of the storage space and the container cut by a plane perpendicular to at least one of the first surface and the second surface are both rectangular. The wavelength conversion member in any one of 6 thru | or 6.
  8. 　前記着色層は、白色に着色されていることを特徴とする請求項１ないし７のいずれかに記載の波長変換部材。 The wavelength conversion member according to any one of claims 1 to 7, wherein the colored layer is colored white.
  9. 　前記着色層は塗料、インク、あるいはテープにより構成されることを特徴とする請求項１ないし８のいずれかに記載の波長変換部材。 The wavelength conversion member according to any one of claims 1 to 8, wherein the colored layer is made of paint, ink, or tape.
  10. 　前記波長変換物質を構成する樹脂の屈折率は、前記容器の屈折率よりも小さいことを特徴とする請求項１ないし９のいずれかに記載の波長変換部材。 The wavelength conversion member according to any one of claims 1 to 9, wherein a refractive index of a resin constituting the wavelength conversion substance is smaller than a refractive index of the container.
  11. 　前記第１の面に対向して設けられた発光素子と、前記発光素子の発光側に配置される請求項１ないし１０のいずれかに記載の波長変換部材と、を有して構成されることを特徴とする発光装置。 The light-emitting element provided to face the first surface, and the wavelength conversion member according to claim 1 disposed on a light-emitting side of the light-emitting element. A light emitting device characterized by the above.
  12. 　青色光を発する発光チップと、前記発光チップの光出射側に配置された請求項１ないし１０のいずれかに記載の波長変換部材と、を有して構成されることを特徴とする発光素子。 A light emitting device comprising: a light emitting chip that emits blue light; and the wavelength conversion member according to claim 1 disposed on a light emitting side of the light emitting chip.
  13. 　請求項１１に記載の発光装置、あるいは、請求項１２に記載の発光素子と、導光板と、を有することを特徴とする光源装置。 A light source device comprising the light emitting device according to claim 11 or the light emitting element according to claim 12 and a light guide plate.
  14. 　表示部と、前記表示部の裏面側に配置された請求項１１に記載の発光装置、あるいは、請求項１２に記載の発光素子と、を有することを特徴とする表示装置。
          A display device comprising: a display unit; and the light-emitting device according to claim 11 or the light-emitting element according to claim 12 arranged on a back side of the display unit.
PCT/JP2015/073061 2014-08-22 2015-08-18 Wavelength conversion member, and light-emitting apparatus, light-emitting element, light source apparatus, and display apparatus using same WO2016027789A1 (en)

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CN201580044961.5A CN106663727B (en) 2014-08-22 2015-08-18 Wavelength conversion member, and light-emitting device, light-emitting element, light source device, and display device using same
KR1020177003704A KR20170045206A (en) 2014-08-22 2015-08-18 Wavelength conversion member, and light-emitting apparatus, light-emitting element, light source apparatus, and display apparatus using same
US15/504,200 US10598844B2 (en) 2014-08-22 2015-08-18 Wavelength conversion member, and light-emitting apparatus, light-emitting element, light source apparatus, and display apparatus using same
EP15833902.8A EP3185316A4 (en) 2014-08-22 2015-08-18 Wavelength conversion member, and light-emitting apparatus, light-emitting element, light source apparatus, and display apparatus using same
JP2016544205A JP6746498B2 (en) 2014-08-22 2015-08-18 Wavelength conversion member, light emitting device using the same, light emitting element, light source device, and display device

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US10598844B2 (en) 2020-03-24
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KR20170045206A (en) 2017-04-26
CN106663727A (en) 2017-05-10
EP3185316A1 (en) 2017-06-28
US20170269280A1 (en) 2017-09-21
EP3185316A4 (en) 2018-03-07
TWI696301B (en) 2020-06-11
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JPWO2016027789A1 (en) 2017-07-20
TW201616693A (en) 2016-05-01

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